diff --git a/croutine.c b/croutine.c
index 6b4bb0e..33844cc 100644
--- a/croutine.c
+++ b/croutine.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/event_groups.c b/event_groups.c
index d3d6998..ada8091 100644
--- a/event_groups.c
+++ b/event_groups.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/FreeRTOS.h b/include/FreeRTOS.h
index bac77a3..bf0b4bc 100644
--- a/include/FreeRTOS.h
+++ b/include/FreeRTOS.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/StackMacros.h b/include/StackMacros.h
index 3cacabb..e3fca66 100644
--- a/include/StackMacros.h
+++ b/include/StackMacros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/atomic.h b/include/atomic.h
index 265514f..83965d4 100644
--- a/include/atomic.h
+++ b/include/atomic.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/croutine.h b/include/croutine.h
index f799b2f..56a93a6 100644
--- a/include/croutine.h
+++ b/include/croutine.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/deprecated_definitions.h b/include/deprecated_definitions.h
index eb9ff99..cdc837d 100644
--- a/include/deprecated_definitions.h
+++ b/include/deprecated_definitions.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/event_groups.h b/include/event_groups.h
index 58191f4..1158415 100644
--- a/include/event_groups.h
+++ b/include/event_groups.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/list.h b/include/list.h
index 42badbe..afb359b 100644
--- a/include/list.h
+++ b/include/list.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/message_buffer.h b/include/message_buffer.h
index 54fc481..41d3a69 100644
--- a/include/message_buffer.h
+++ b/include/message_buffer.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/mpu_prototypes.h b/include/mpu_prototypes.h
index 7e46e73..7a6442f 100644
--- a/include/mpu_prototypes.h
+++ b/include/mpu_prototypes.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/mpu_wrappers.h b/include/mpu_wrappers.h
index 80037ee..c8d5f15 100644
--- a/include/mpu_wrappers.h
+++ b/include/mpu_wrappers.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/portable.h b/include/portable.h
index f72b9b4..9b36ed8 100644
--- a/include/portable.h
+++ b/include/portable.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/projdefs.h b/include/projdefs.h
index db255a3..5be3841 100644
--- a/include/projdefs.h
+++ b/include/projdefs.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/queue.h b/include/queue.h
index 4bef5b8..3809ed5 100644
--- a/include/queue.h
+++ b/include/queue.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/semphr.h b/include/semphr.h
index 9002157..cbf27bb 100644
--- a/include/semphr.h
+++ b/include/semphr.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/stack_macros.h b/include/stack_macros.h
index c728988..ce4bb59 100644
--- a/include/stack_macros.h
+++ b/include/stack_macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/stdint.readme b/include/stdint.readme
index 6679344..41d4df9 100644
--- a/include/stdint.readme
+++ b/include/stdint.readme
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/stream_buffer.h b/include/stream_buffer.h
index b612c5a..6ad75e7 100644
--- a/include/stream_buffer.h
+++ b/include/stream_buffer.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/task.h b/include/task.h
index f41533e..57e5dd9 100644
--- a/include/task.h
+++ b/include/task.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/include/timers.h b/include/timers.h
index cb57a7e..c63bfeb 100644
--- a/include/timers.h
+++ b/include/timers.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/list.c b/list.c
index c0b6c31..fa25389 100644
--- a/list.c
+++ b/list.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/copy_files.py b/portable/ARMv8M/copy_files.py
index 0628816..5c49121 100644
--- a/portable/ARMv8M/copy_files.py
+++ b/portable/ARMv8M/copy_files.py
@@ -2,6 +2,8 @@
 # * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 # * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 # *
+# * SPDX-License-Identifier: MIT
+# *
 # * Permission is hereby granted, free of charge, to any person obtaining a copy of
 # * this software and associated documentation files (the "Software"), to deal in
 # * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/port.c b/portable/ARMv8M/non_secure/port.c
index fd46622..0d8294e 100644
--- a/portable/ARMv8M/non_secure/port.c
+++ b/portable/ARMv8M/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portasm.c b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portasm.c
index a9934c0..a53ceb6 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portasm.c
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portmacro.h b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portmacro.h
index ecef3f3..57fbaea 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portasm.c b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portasm.c
index 2151721..4866a37 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portasm.c
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portmacro.h b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portmacro.h
index ecef3f3..57fbaea 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM23_NTZ/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portasm.c b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portasm.c
index c5b9cf8..cd4389a 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portasm.c
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portmacro.h b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portmacro.h
index 7ea73ba..980a26a 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portasm.c b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portasm.c
index a1ed8df..95249d3 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portasm.c
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portmacro.h b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portmacro.h
index 7ea73ba..980a26a 100644
--- a/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/GCC/ARM_CM33_NTZ/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portasm.s b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portasm.s
index eb825eb..27a97c9 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portasm.s
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portmacro.h b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portmacro.h
index e980734..db5d4be 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portasm.s b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portasm.s
index a87871b..915d1e9 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portasm.s
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portmacro.h b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portmacro.h
index a53f8b0..d047133 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM23_NTZ/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portasm.s b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portasm.s
index a66a958..25135f5 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portasm.s
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portmacro.h b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portmacro.h
index a00e840..dcdd0f6 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s
index 94ba354..a2e877d 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portmacro.h b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portmacro.h
index a00e840..dcdd0f6 100644
--- a/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portmacro.h
+++ b/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/non_secure/portasm.h b/portable/ARMv8M/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/ARMv8M/non_secure/portasm.h
+++ b/portable/ARMv8M/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/portable/GCC/ARM_CM23/secure_context_port.c b/portable/ARMv8M/secure/context/portable/GCC/ARM_CM23/secure_context_port.c
index 3a19ef2..a85024b 100644
--- a/portable/ARMv8M/secure/context/portable/GCC/ARM_CM23/secure_context_port.c
+++ b/portable/ARMv8M/secure/context/portable/GCC/ARM_CM23/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/portable/GCC/ARM_CM33/secure_context_port.c b/portable/ARMv8M/secure/context/portable/GCC/ARM_CM33/secure_context_port.c
index f8f916f..fc625c4 100644
--- a/portable/ARMv8M/secure/context/portable/GCC/ARM_CM33/secure_context_port.c
+++ b/portable/ARMv8M/secure/context/portable/GCC/ARM_CM33/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port.c b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port.c
index 9da1aaf..9994032 100644
--- a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port.c
+++ b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port_asm.s b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port_asm.s
index 403f11b..8f47e5e 100644
--- a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port_asm.s
+++ b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM23/secure_context_port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port.c b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port.c
index 9da1aaf..9994032 100644
--- a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port.c
+++ b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port_asm.s b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port_asm.s
index 86322ff..b4934ad 100644
--- a/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port_asm.s
+++ b/portable/ARMv8M/secure/context/portable/IAR/ARM_CM33/secure_context_port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/secure_context.c b/portable/ARMv8M/secure/context/secure_context.c
index 2b065cf..a0a85bd 100644
--- a/portable/ARMv8M/secure/context/secure_context.c
+++ b/portable/ARMv8M/secure/context/secure_context.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/context/secure_context.h b/portable/ARMv8M/secure/context/secure_context.h
index 03a9e4d..1167fbd 100644
--- a/portable/ARMv8M/secure/context/secure_context.h
+++ b/portable/ARMv8M/secure/context/secure_context.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/heap/secure_heap.c b/portable/ARMv8M/secure/heap/secure_heap.c
index ba90dba..6752f91 100644
--- a/portable/ARMv8M/secure/heap/secure_heap.c
+++ b/portable/ARMv8M/secure/heap/secure_heap.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/heap/secure_heap.h b/portable/ARMv8M/secure/heap/secure_heap.h
index 5e39834..29b00d1 100644
--- a/portable/ARMv8M/secure/heap/secure_heap.h
+++ b/portable/ARMv8M/secure/heap/secure_heap.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/init/secure_init.c b/portable/ARMv8M/secure/init/secure_init.c
index 84b9c7d..1fa482a 100644
--- a/portable/ARMv8M/secure/init/secure_init.c
+++ b/portable/ARMv8M/secure/init/secure_init.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/init/secure_init.h b/portable/ARMv8M/secure/init/secure_init.h
index 48559ae..70cbf34 100644
--- a/portable/ARMv8M/secure/init/secure_init.h
+++ b/portable/ARMv8M/secure/init/secure_init.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ARMv8M/secure/macros/secure_port_macros.h b/portable/ARMv8M/secure/macros/secure_port_macros.h
index b6efa1e..6d05b25 100644
--- a/portable/ARMv8M/secure/macros/secure_port_macros.h
+++ b/portable/ARMv8M/secure/macros/secure_port_macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/BCC/16BitDOS/Flsh186/port.c b/portable/BCC/16BitDOS/Flsh186/port.c
index 2378e90..1a90d38 100644
--- a/portable/BCC/16BitDOS/Flsh186/port.c
+++ b/portable/BCC/16BitDOS/Flsh186/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/BCC/16BitDOS/Flsh186/prtmacro.h b/portable/BCC/16BitDOS/Flsh186/prtmacro.h
index dc1fcaa..42185f0 100644
--- a/portable/BCC/16BitDOS/Flsh186/prtmacro.h
+++ b/portable/BCC/16BitDOS/Flsh186/prtmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/BCC/16BitDOS/PC/port.c b/portable/BCC/16BitDOS/PC/port.c
index 99c6546..3236ec7 100644
--- a/portable/BCC/16BitDOS/PC/port.c
+++ b/portable/BCC/16BitDOS/PC/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/BCC/16BitDOS/PC/prtmacro.h b/portable/BCC/16BitDOS/PC/prtmacro.h
index 3d95374..57be8a9 100644
--- a/portable/BCC/16BitDOS/PC/prtmacro.h
+++ b/portable/BCC/16BitDOS/PC/prtmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/BCC/16BitDOS/common/portasm.h b/portable/BCC/16BitDOS/common/portasm.h
index 5791f11..5e3e933 100644
--- a/portable/BCC/16BitDOS/common/portasm.h
+++ b/portable/BCC/16BitDOS/common/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/BCC/16BitDOS/common/portcomn.c b/portable/BCC/16BitDOS/common/portcomn.c
index 03cda18..099204a 100644
--- a/portable/BCC/16BitDOS/common/portcomn.c
+++ b/portable/BCC/16BitDOS/common/portcomn.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_CM3/port.c b/portable/CCS/ARM_CM3/port.c
index 9f773b8..bf250a9 100644
--- a/portable/CCS/ARM_CM3/port.c
+++ b/portable/CCS/ARM_CM3/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_CM3/portasm.asm b/portable/CCS/ARM_CM3/portasm.asm
index 591701b..cac2b23 100644
--- a/portable/CCS/ARM_CM3/portasm.asm
+++ b/portable/CCS/ARM_CM3/portasm.asm
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_CM3/portmacro.h b/portable/CCS/ARM_CM3/portmacro.h
index 8f0b690..056070d 100644
--- a/portable/CCS/ARM_CM3/portmacro.h
+++ b/portable/CCS/ARM_CM3/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_CM4F/port.c b/portable/CCS/ARM_CM4F/port.c
index 95f414c..41e5641 100644
--- a/portable/CCS/ARM_CM4F/port.c
+++ b/portable/CCS/ARM_CM4F/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_CM4F/portasm.asm b/portable/CCS/ARM_CM4F/portasm.asm
index fe47495..c842e46 100644
--- a/portable/CCS/ARM_CM4F/portasm.asm
+++ b/portable/CCS/ARM_CM4F/portasm.asm
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_CM4F/portmacro.h b/portable/CCS/ARM_CM4F/portmacro.h
index a8bd7a9..3e032f0 100644
--- a/portable/CCS/ARM_CM4F/portmacro.h
+++ b/portable/CCS/ARM_CM4F/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_Cortex-R4/port.c b/portable/CCS/ARM_Cortex-R4/port.c
index 38c5a09..f277734 100644
--- a/portable/CCS/ARM_Cortex-R4/port.c
+++ b/portable/CCS/ARM_Cortex-R4/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_Cortex-R4/portASM.asm b/portable/CCS/ARM_Cortex-R4/portASM.asm
index 0c5457d..c98772c 100644
--- a/portable/CCS/ARM_Cortex-R4/portASM.asm
+++ b/portable/CCS/ARM_Cortex-R4/portASM.asm
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/ARM_Cortex-R4/portmacro.h b/portable/CCS/ARM_Cortex-R4/portmacro.h
index 7479dda..24187b7 100644
--- a/portable/CCS/ARM_Cortex-R4/portmacro.h
+++ b/portable/CCS/ARM_Cortex-R4/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/MSP430X/data_model.h b/portable/CCS/MSP430X/data_model.h
index e6df5a5..ac97fa3 100644
--- a/portable/CCS/MSP430X/data_model.h
+++ b/portable/CCS/MSP430X/data_model.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/MSP430X/port.c b/portable/CCS/MSP430X/port.c
index 7aa0584..5812b66 100644
--- a/portable/CCS/MSP430X/port.c
+++ b/portable/CCS/MSP430X/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/MSP430X/portext.asm b/portable/CCS/MSP430X/portext.asm
index 8be578d..41208f0 100644
--- a/portable/CCS/MSP430X/portext.asm
+++ b/portable/CCS/MSP430X/portext.asm
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/CCS/MSP430X/portmacro.h b/portable/CCS/MSP430X/portmacro.h
index ba2e3ae..33a1250 100644
--- a/portable/CCS/MSP430X/portmacro.h
+++ b/portable/CCS/MSP430X/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/ColdFire_V1/port.c b/portable/CodeWarrior/ColdFire_V1/port.c
index f69e421..9fc082a 100644
--- a/portable/CodeWarrior/ColdFire_V1/port.c
+++ b/portable/CodeWarrior/ColdFire_V1/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/ColdFire_V1/portasm.S b/portable/CodeWarrior/ColdFire_V1/portasm.S
index 10202ab..2cdfb4c 100644
--- a/portable/CodeWarrior/ColdFire_V1/portasm.S
+++ b/portable/CodeWarrior/ColdFire_V1/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/ColdFire_V1/portmacro.h b/portable/CodeWarrior/ColdFire_V1/portmacro.h
index ecc214c..65cb5ca 100644
--- a/portable/CodeWarrior/ColdFire_V1/portmacro.h
+++ b/portable/CodeWarrior/ColdFire_V1/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/ColdFire_V2/port.c b/portable/CodeWarrior/ColdFire_V2/port.c
index 1839dc5..7f1f4b9 100644
--- a/portable/CodeWarrior/ColdFire_V2/port.c
+++ b/portable/CodeWarrior/ColdFire_V2/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/ColdFire_V2/portasm.S b/portable/CodeWarrior/ColdFire_V2/portasm.S
index cad8a9c..cd7031c 100644
--- a/portable/CodeWarrior/ColdFire_V2/portasm.S
+++ b/portable/CodeWarrior/ColdFire_V2/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/ColdFire_V2/portmacro.h b/portable/CodeWarrior/ColdFire_V2/portmacro.h
index a341ecf..5155c52 100644
--- a/portable/CodeWarrior/ColdFire_V2/portmacro.h
+++ b/portable/CodeWarrior/ColdFire_V2/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/HCS12/port.c b/portable/CodeWarrior/HCS12/port.c
index 298dbd4..7758950 100644
--- a/portable/CodeWarrior/HCS12/port.c
+++ b/portable/CodeWarrior/HCS12/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/CodeWarrior/HCS12/portmacro.h b/portable/CodeWarrior/HCS12/portmacro.h
index 697d221..569ec94 100644
--- a/portable/CodeWarrior/HCS12/portmacro.h
+++ b/portable/CodeWarrior/HCS12/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Common/mpu_wrappers.c b/portable/Common/mpu_wrappers.c
index ad58e49..e6feedb 100644
--- a/portable/Common/mpu_wrappers.c
+++ b/portable/Common/mpu_wrappers.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_AT91FR40008/port.c b/portable/GCC/ARM7_AT91FR40008/port.c
index 0452868..1cc4c03 100644
--- a/portable/GCC/ARM7_AT91FR40008/port.c
+++ b/portable/GCC/ARM7_AT91FR40008/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_AT91FR40008/portISR.c b/portable/GCC/ARM7_AT91FR40008/portISR.c
index 12bb518..2083637 100644
--- a/portable/GCC/ARM7_AT91FR40008/portISR.c
+++ b/portable/GCC/ARM7_AT91FR40008/portISR.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_AT91FR40008/portmacro.h b/portable/GCC/ARM7_AT91FR40008/portmacro.h
index bc0cfa2..6305bcd 100644
--- a/portable/GCC/ARM7_AT91FR40008/portmacro.h
+++ b/portable/GCC/ARM7_AT91FR40008/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_AT91SAM7S/port.c b/portable/GCC/ARM7_AT91SAM7S/port.c
index 6f6ab4f..918ac10 100644
--- a/portable/GCC/ARM7_AT91SAM7S/port.c
+++ b/portable/GCC/ARM7_AT91SAM7S/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_AT91SAM7S/portISR.c b/portable/GCC/ARM7_AT91SAM7S/portISR.c
index 50725f9..a65a9e8 100644
--- a/portable/GCC/ARM7_AT91SAM7S/portISR.c
+++ b/portable/GCC/ARM7_AT91SAM7S/portISR.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_AT91SAM7S/portmacro.h b/portable/GCC/ARM7_AT91SAM7S/portmacro.h
index d5cccb9..ca329d5 100644
--- a/portable/GCC/ARM7_AT91SAM7S/portmacro.h
+++ b/portable/GCC/ARM7_AT91SAM7S/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_LPC2000/port.c b/portable/GCC/ARM7_LPC2000/port.c
index 9eca67f..d80e142 100644
--- a/portable/GCC/ARM7_LPC2000/port.c
+++ b/portable/GCC/ARM7_LPC2000/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_LPC2000/portISR.c b/portable/GCC/ARM7_LPC2000/portISR.c
index 5b4050f..aceee09 100644
--- a/portable/GCC/ARM7_LPC2000/portISR.c
+++ b/portable/GCC/ARM7_LPC2000/portISR.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_LPC2000/portmacro.h b/portable/GCC/ARM7_LPC2000/portmacro.h
index db41274..dfa426e 100644
--- a/portable/GCC/ARM7_LPC2000/portmacro.h
+++ b/portable/GCC/ARM7_LPC2000/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_LPC23xx/port.c b/portable/GCC/ARM7_LPC23xx/port.c
index 59de238..1b0c652 100644
--- a/portable/GCC/ARM7_LPC23xx/port.c
+++ b/portable/GCC/ARM7_LPC23xx/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_LPC23xx/portISR.c b/portable/GCC/ARM7_LPC23xx/portISR.c
index a82a9fd..375ef9f 100644
--- a/portable/GCC/ARM7_LPC23xx/portISR.c
+++ b/portable/GCC/ARM7_LPC23xx/portISR.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM7_LPC23xx/portmacro.h b/portable/GCC/ARM7_LPC23xx/portmacro.h
index 8bf0815..7d7ed39 100644
--- a/portable/GCC/ARM7_LPC23xx/portmacro.h
+++ b/portable/GCC/ARM7_LPC23xx/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CA53_64_BIT/port.c b/portable/GCC/ARM_CA53_64_BIT/port.c
index cfb15b5..3df7fbc 100644
--- a/portable/GCC/ARM_CA53_64_BIT/port.c
+++ b/portable/GCC/ARM_CA53_64_BIT/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CA53_64_BIT/portASM.S b/portable/GCC/ARM_CA53_64_BIT/portASM.S
index 2d0dadb..05c4a7c 100644
--- a/portable/GCC/ARM_CA53_64_BIT/portASM.S
+++ b/portable/GCC/ARM_CA53_64_BIT/portASM.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CA53_64_BIT/portmacro.h b/portable/GCC/ARM_CA53_64_BIT/portmacro.h
index cf3d870..9553783 100644
--- a/portable/GCC/ARM_CA53_64_BIT/portmacro.h
+++ b/portable/GCC/ARM_CA53_64_BIT/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CA9/port.c b/portable/GCC/ARM_CA9/port.c
index fd84841..5b5967b 100644
--- a/portable/GCC/ARM_CA9/port.c
+++ b/portable/GCC/ARM_CA9/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CA9/portASM.S b/portable/GCC/ARM_CA9/portASM.S
index f5d889d..519353a 100644
--- a/portable/GCC/ARM_CA9/portASM.S
+++ b/portable/GCC/ARM_CA9/portASM.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CA9/portmacro.h b/portable/GCC/ARM_CA9/portmacro.h
index 96689e1..7a45c84 100644
--- a/portable/GCC/ARM_CA9/portmacro.h
+++ b/portable/GCC/ARM_CA9/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM0/port.c b/portable/GCC/ARM_CM0/port.c
index b5ac242..939478c 100644
--- a/portable/GCC/ARM_CM0/port.c
+++ b/portable/GCC/ARM_CM0/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM0/portmacro.h b/portable/GCC/ARM_CM0/portmacro.h
index 67836f0..6576e2c 100644
--- a/portable/GCC/ARM_CM0/portmacro.h
+++ b/portable/GCC/ARM_CM0/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/non_secure/port.c b/portable/GCC/ARM_CM23/non_secure/port.c
index 7a066ae..5c5c7d8 100644
--- a/portable/GCC/ARM_CM23/non_secure/port.c
+++ b/portable/GCC/ARM_CM23/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/non_secure/portasm.c b/portable/GCC/ARM_CM23/non_secure/portasm.c
index a9934c0..a53ceb6 100644
--- a/portable/GCC/ARM_CM23/non_secure/portasm.c
+++ b/portable/GCC/ARM_CM23/non_secure/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/non_secure/portasm.h b/portable/GCC/ARM_CM23/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/GCC/ARM_CM23/non_secure/portasm.h
+++ b/portable/GCC/ARM_CM23/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/non_secure/portmacro.h b/portable/GCC/ARM_CM23/non_secure/portmacro.h
index ecef3f3..57fbaea 100644
--- a/portable/GCC/ARM_CM23/non_secure/portmacro.h
+++ b/portable/GCC/ARM_CM23/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_context.c b/portable/GCC/ARM_CM23/secure/secure_context.c
index 2b065cf..a0a85bd 100644
--- a/portable/GCC/ARM_CM23/secure/secure_context.c
+++ b/portable/GCC/ARM_CM23/secure/secure_context.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_context.h b/portable/GCC/ARM_CM23/secure/secure_context.h
index 03a9e4d..1167fbd 100644
--- a/portable/GCC/ARM_CM23/secure/secure_context.h
+++ b/portable/GCC/ARM_CM23/secure/secure_context.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_context_port.c b/portable/GCC/ARM_CM23/secure/secure_context_port.c
index 3a19ef2..a85024b 100644
--- a/portable/GCC/ARM_CM23/secure/secure_context_port.c
+++ b/portable/GCC/ARM_CM23/secure/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_heap.c b/portable/GCC/ARM_CM23/secure/secure_heap.c
index ba90dba..6752f91 100644
--- a/portable/GCC/ARM_CM23/secure/secure_heap.c
+++ b/portable/GCC/ARM_CM23/secure/secure_heap.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_heap.h b/portable/GCC/ARM_CM23/secure/secure_heap.h
index 5e39834..29b00d1 100644
--- a/portable/GCC/ARM_CM23/secure/secure_heap.h
+++ b/portable/GCC/ARM_CM23/secure/secure_heap.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_init.c b/portable/GCC/ARM_CM23/secure/secure_init.c
index 84b9c7d..1fa482a 100644
--- a/portable/GCC/ARM_CM23/secure/secure_init.c
+++ b/portable/GCC/ARM_CM23/secure/secure_init.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_init.h b/portable/GCC/ARM_CM23/secure/secure_init.h
index 48559ae..70cbf34 100644
--- a/portable/GCC/ARM_CM23/secure/secure_init.h
+++ b/portable/GCC/ARM_CM23/secure/secure_init.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23/secure/secure_port_macros.h b/portable/GCC/ARM_CM23/secure/secure_port_macros.h
index b6efa1e..6d05b25 100644
--- a/portable/GCC/ARM_CM23/secure/secure_port_macros.h
+++ b/portable/GCC/ARM_CM23/secure/secure_port_macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23_NTZ/non_secure/port.c b/portable/GCC/ARM_CM23_NTZ/non_secure/port.c
index fd46622..0d8294e 100644
--- a/portable/GCC/ARM_CM23_NTZ/non_secure/port.c
+++ b/portable/GCC/ARM_CM23_NTZ/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.c b/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.c
index 2151721..4866a37 100644
--- a/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.c
+++ b/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.h b/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.h
+++ b/portable/GCC/ARM_CM23_NTZ/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM23_NTZ/non_secure/portmacro.h b/portable/GCC/ARM_CM23_NTZ/non_secure/portmacro.h
index ecef3f3..57fbaea 100644
--- a/portable/GCC/ARM_CM23_NTZ/non_secure/portmacro.h
+++ b/portable/GCC/ARM_CM23_NTZ/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM3/port.c b/portable/GCC/ARM_CM3/port.c
index ba23ac3..45a4834 100644
--- a/portable/GCC/ARM_CM3/port.c
+++ b/portable/GCC/ARM_CM3/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM3/portmacro.h b/portable/GCC/ARM_CM3/portmacro.h
index 1ac63f1..8a4c7ca 100644
--- a/portable/GCC/ARM_CM3/portmacro.h
+++ b/portable/GCC/ARM_CM3/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/non_secure/port.c b/portable/GCC/ARM_CM33/non_secure/port.c
index fd46622..0d8294e 100644
--- a/portable/GCC/ARM_CM33/non_secure/port.c
+++ b/portable/GCC/ARM_CM33/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/non_secure/portasm.c b/portable/GCC/ARM_CM33/non_secure/portasm.c
index c5b9cf8..cd4389a 100644
--- a/portable/GCC/ARM_CM33/non_secure/portasm.c
+++ b/portable/GCC/ARM_CM33/non_secure/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/non_secure/portasm.h b/portable/GCC/ARM_CM33/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/GCC/ARM_CM33/non_secure/portasm.h
+++ b/portable/GCC/ARM_CM33/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/non_secure/portmacro.h b/portable/GCC/ARM_CM33/non_secure/portmacro.h
index 7ea73ba..980a26a 100644
--- a/portable/GCC/ARM_CM33/non_secure/portmacro.h
+++ b/portable/GCC/ARM_CM33/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_context.c b/portable/GCC/ARM_CM33/secure/secure_context.c
index 2b065cf..a0a85bd 100644
--- a/portable/GCC/ARM_CM33/secure/secure_context.c
+++ b/portable/GCC/ARM_CM33/secure/secure_context.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_context.h b/portable/GCC/ARM_CM33/secure/secure_context.h
index 03a9e4d..1167fbd 100644
--- a/portable/GCC/ARM_CM33/secure/secure_context.h
+++ b/portable/GCC/ARM_CM33/secure/secure_context.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_context_port.c b/portable/GCC/ARM_CM33/secure/secure_context_port.c
index f8f916f..fc625c4 100644
--- a/portable/GCC/ARM_CM33/secure/secure_context_port.c
+++ b/portable/GCC/ARM_CM33/secure/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_heap.c b/portable/GCC/ARM_CM33/secure/secure_heap.c
index ba90dba..6752f91 100644
--- a/portable/GCC/ARM_CM33/secure/secure_heap.c
+++ b/portable/GCC/ARM_CM33/secure/secure_heap.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_heap.h b/portable/GCC/ARM_CM33/secure/secure_heap.h
index 5e39834..29b00d1 100644
--- a/portable/GCC/ARM_CM33/secure/secure_heap.h
+++ b/portable/GCC/ARM_CM33/secure/secure_heap.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_init.c b/portable/GCC/ARM_CM33/secure/secure_init.c
index 84b9c7d..1fa482a 100644
--- a/portable/GCC/ARM_CM33/secure/secure_init.c
+++ b/portable/GCC/ARM_CM33/secure/secure_init.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_init.h b/portable/GCC/ARM_CM33/secure/secure_init.h
index 48559ae..70cbf34 100644
--- a/portable/GCC/ARM_CM33/secure/secure_init.h
+++ b/portable/GCC/ARM_CM33/secure/secure_init.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33/secure/secure_port_macros.h b/portable/GCC/ARM_CM33/secure/secure_port_macros.h
index b6efa1e..6d05b25 100644
--- a/portable/GCC/ARM_CM33/secure/secure_port_macros.h
+++ b/portable/GCC/ARM_CM33/secure/secure_port_macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33_NTZ/non_secure/port.c b/portable/GCC/ARM_CM33_NTZ/non_secure/port.c
index 7a066ae..5c5c7d8 100644
--- a/portable/GCC/ARM_CM33_NTZ/non_secure/port.c
+++ b/portable/GCC/ARM_CM33_NTZ/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.c b/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.c
index a1ed8df..95249d3 100644
--- a/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.c
+++ b/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.h b/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.h
+++ b/portable/GCC/ARM_CM33_NTZ/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM33_NTZ/non_secure/portmacro.h b/portable/GCC/ARM_CM33_NTZ/non_secure/portmacro.h
index 7ea73ba..980a26a 100644
--- a/portable/GCC/ARM_CM33_NTZ/non_secure/portmacro.h
+++ b/portable/GCC/ARM_CM33_NTZ/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM3_MPU/port.c b/portable/GCC/ARM_CM3_MPU/port.c
index 79149cb..0e35ee6 100644
--- a/portable/GCC/ARM_CM3_MPU/port.c
+++ b/portable/GCC/ARM_CM3_MPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM3_MPU/portmacro.h b/portable/GCC/ARM_CM3_MPU/portmacro.h
index f14b78e..4c204db 100644
--- a/portable/GCC/ARM_CM3_MPU/portmacro.h
+++ b/portable/GCC/ARM_CM3_MPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM4F/port.c b/portable/GCC/ARM_CM4F/port.c
index ebf08b1..c705913 100644
--- a/portable/GCC/ARM_CM4F/port.c
+++ b/portable/GCC/ARM_CM4F/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM4F/portmacro.h b/portable/GCC/ARM_CM4F/portmacro.h
index 0c44a9d..28cc6a7 100644
--- a/portable/GCC/ARM_CM4F/portmacro.h
+++ b/portable/GCC/ARM_CM4F/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM4_MPU/port.c b/portable/GCC/ARM_CM4_MPU/port.c
index 8453f8b..111324d 100644
--- a/portable/GCC/ARM_CM4_MPU/port.c
+++ b/portable/GCC/ARM_CM4_MPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM4_MPU/portmacro.h b/portable/GCC/ARM_CM4_MPU/portmacro.h
index 3c4c5e7..e1afcd7 100644
--- a/portable/GCC/ARM_CM4_MPU/portmacro.h
+++ b/portable/GCC/ARM_CM4_MPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM7/r0p1/port.c b/portable/GCC/ARM_CM7/r0p1/port.c
index ab1e7b7..333aea4 100644
--- a/portable/GCC/ARM_CM7/r0p1/port.c
+++ b/portable/GCC/ARM_CM7/r0p1/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CM7/r0p1/portmacro.h b/portable/GCC/ARM_CM7/r0p1/portmacro.h
index bedc585..97cb4bf 100644
--- a/portable/GCC/ARM_CM7/r0p1/portmacro.h
+++ b/portable/GCC/ARM_CM7/r0p1/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CR5/port.c b/portable/GCC/ARM_CR5/port.c
index 9c59afe..ef7aed8 100644
--- a/portable/GCC/ARM_CR5/port.c
+++ b/portable/GCC/ARM_CR5/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CR5/portASM.S b/portable/GCC/ARM_CR5/portASM.S
index 3e78109..dc54d38 100644
--- a/portable/GCC/ARM_CR5/portASM.S
+++ b/portable/GCC/ARM_CR5/portASM.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CR5/portmacro.h b/portable/GCC/ARM_CR5/portmacro.h
index 02a399a..0a8a281 100644
--- a/portable/GCC/ARM_CR5/portmacro.h
+++ b/portable/GCC/ARM_CR5/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CRx_No_GIC/port.c b/portable/GCC/ARM_CRx_No_GIC/port.c
index c6ffe63..a84aad1 100644
--- a/portable/GCC/ARM_CRx_No_GIC/port.c
+++ b/portable/GCC/ARM_CRx_No_GIC/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CRx_No_GIC/portASM.S b/portable/GCC/ARM_CRx_No_GIC/portASM.S
index aa9c575..c0df63e 100644
--- a/portable/GCC/ARM_CRx_No_GIC/portASM.S
+++ b/portable/GCC/ARM_CRx_No_GIC/portASM.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ARM_CRx_No_GIC/portmacro.h b/portable/GCC/ARM_CRx_No_GIC/portmacro.h
index 69520fa..4638861 100644
--- a/portable/GCC/ARM_CRx_No_GIC/portmacro.h
+++ b/portable/GCC/ARM_CRx_No_GIC/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ATMega323/port.c b/portable/GCC/ATMega323/port.c
index c06ceeb..7f32b3e 100644
--- a/portable/GCC/ATMega323/port.c
+++ b/portable/GCC/ATMega323/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ATMega323/portmacro.h b/portable/GCC/ATMega323/portmacro.h
index 2eb4260..0bad84e 100644
--- a/portable/GCC/ATMega323/portmacro.h
+++ b/portable/GCC/ATMega323/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/AVR_AVRDx/port.c b/portable/GCC/AVR_AVRDx/port.c
index c1ce06f..f81af94 100644
--- a/portable/GCC/AVR_AVRDx/port.c
+++ b/portable/GCC/AVR_AVRDx/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/AVR_AVRDx/porthardware.h b/portable/GCC/AVR_AVRDx/porthardware.h
index b070e9a..ca0302e 100644
--- a/portable/GCC/AVR_AVRDx/porthardware.h
+++ b/portable/GCC/AVR_AVRDx/porthardware.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/AVR_AVRDx/portmacro.h b/portable/GCC/AVR_AVRDx/portmacro.h
index df359f2..f26acca 100644
--- a/portable/GCC/AVR_AVRDx/portmacro.h
+++ b/portable/GCC/AVR_AVRDx/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/AVR_Mega0/port.c b/portable/GCC/AVR_Mega0/port.c
index 7f30d4d..1e25d13 100644
--- a/portable/GCC/AVR_Mega0/port.c
+++ b/portable/GCC/AVR_Mega0/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/AVR_Mega0/porthardware.h b/portable/GCC/AVR_Mega0/porthardware.h
index f22e1d6..758d949 100644
--- a/portable/GCC/AVR_Mega0/porthardware.h
+++ b/portable/GCC/AVR_Mega0/porthardware.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/AVR_Mega0/portmacro.h b/portable/GCC/AVR_Mega0/portmacro.h
index 14177ba..7d66a73 100644
--- a/portable/GCC/AVR_Mega0/portmacro.h
+++ b/portable/GCC/AVR_Mega0/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/CORTUS_APS3/port.c b/portable/GCC/CORTUS_APS3/port.c
index 8438672..a277b4c 100644
--- a/portable/GCC/CORTUS_APS3/port.c
+++ b/portable/GCC/CORTUS_APS3/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/CORTUS_APS3/portmacro.h b/portable/GCC/CORTUS_APS3/portmacro.h
index c107aa8..e62873d 100644
--- a/portable/GCC/CORTUS_APS3/portmacro.h
+++ b/portable/GCC/CORTUS_APS3/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ColdFire_V2/port.c b/portable/GCC/ColdFire_V2/port.c
index d6249ed..5f4fc63 100644
--- a/portable/GCC/ColdFire_V2/port.c
+++ b/portable/GCC/ColdFire_V2/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ColdFire_V2/portasm.S b/portable/GCC/ColdFire_V2/portasm.S
index bdfbf74..56c4f26 100644
--- a/portable/GCC/ColdFire_V2/portasm.S
+++ b/portable/GCC/ColdFire_V2/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/ColdFire_V2/portmacro.h b/portable/GCC/ColdFire_V2/portmacro.h
index a257850..aefe226 100644
--- a/portable/GCC/ColdFire_V2/portmacro.h
+++ b/portable/GCC/ColdFire_V2/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/H8S2329/port.c b/portable/GCC/H8S2329/port.c
index 5856787..190207f 100644
--- a/portable/GCC/H8S2329/port.c
+++ b/portable/GCC/H8S2329/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/H8S2329/portmacro.h b/portable/GCC/H8S2329/portmacro.h
index cb01bfc..90f386e 100644
--- a/portable/GCC/H8S2329/portmacro.h
+++ b/portable/GCC/H8S2329/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/HCS12/port.c b/portable/GCC/HCS12/port.c
index c38ada9..9d131c1 100644
--- a/portable/GCC/HCS12/port.c
+++ b/portable/GCC/HCS12/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/HCS12/portmacro.h b/portable/GCC/HCS12/portmacro.h
index f173092..5e61c16 100644
--- a/portable/GCC/HCS12/portmacro.h
+++ b/portable/GCC/HCS12/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/IA32_flat/ISR_Support.h b/portable/GCC/IA32_flat/ISR_Support.h
index e462b2e..333d41c 100644
--- a/portable/GCC/IA32_flat/ISR_Support.h
+++ b/portable/GCC/IA32_flat/ISR_Support.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/IA32_flat/port.c b/portable/GCC/IA32_flat/port.c
index bc177d0..dbb8f08 100644
--- a/portable/GCC/IA32_flat/port.c
+++ b/portable/GCC/IA32_flat/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/IA32_flat/portASM.S b/portable/GCC/IA32_flat/portASM.S
index 3d43899..d3f7d28 100644
--- a/portable/GCC/IA32_flat/portASM.S
+++ b/portable/GCC/IA32_flat/portASM.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/IA32_flat/portmacro.h b/portable/GCC/IA32_flat/portmacro.h
index aa79ca9..a51d90e 100644
--- a/portable/GCC/IA32_flat/portmacro.h
+++ b/portable/GCC/IA32_flat/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MSP430F449/port.c b/portable/GCC/MSP430F449/port.c
index b9ee360..f0c97ee 100644
--- a/portable/GCC/MSP430F449/port.c
+++ b/portable/GCC/MSP430F449/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MSP430F449/portmacro.h b/portable/GCC/MSP430F449/portmacro.h
index 315edc6..cb71c04 100644
--- a/portable/GCC/MSP430F449/portmacro.h
+++ b/portable/GCC/MSP430F449/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlaze/port.c b/portable/GCC/MicroBlaze/port.c
index 2795318..4c4c902 100644
--- a/portable/GCC/MicroBlaze/port.c
+++ b/portable/GCC/MicroBlaze/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlaze/portasm.s b/portable/GCC/MicroBlaze/portasm.s
index 808c10b..6321889 100644
--- a/portable/GCC/MicroBlaze/portasm.s
+++ b/portable/GCC/MicroBlaze/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlaze/portmacro.h b/portable/GCC/MicroBlaze/portmacro.h
index 0e0b128..a42917b 100644
--- a/portable/GCC/MicroBlaze/portmacro.h
+++ b/portable/GCC/MicroBlaze/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV8/port.c b/portable/GCC/MicroBlazeV8/port.c
index 19343d5..7a087ea 100644
--- a/portable/GCC/MicroBlazeV8/port.c
+++ b/portable/GCC/MicroBlazeV8/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV8/port_exceptions.c b/portable/GCC/MicroBlazeV8/port_exceptions.c
index 8c06293..9e3317f 100644
--- a/portable/GCC/MicroBlazeV8/port_exceptions.c
+++ b/portable/GCC/MicroBlazeV8/port_exceptions.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV8/portasm.S b/portable/GCC/MicroBlazeV8/portasm.S
index 56825fe..6291439 100644
--- a/portable/GCC/MicroBlazeV8/portasm.S
+++ b/portable/GCC/MicroBlazeV8/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV8/portmacro.h b/portable/GCC/MicroBlazeV8/portmacro.h
index c481db7..8c7b3e9 100644
--- a/portable/GCC/MicroBlazeV8/portmacro.h
+++ b/portable/GCC/MicroBlazeV8/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV9/port.c b/portable/GCC/MicroBlazeV9/port.c
index 6b6cb88..2f4013a 100644
--- a/portable/GCC/MicroBlazeV9/port.c
+++ b/portable/GCC/MicroBlazeV9/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV9/port_exceptions.c b/portable/GCC/MicroBlazeV9/port_exceptions.c
index 8c06293..9e3317f 100644
--- a/portable/GCC/MicroBlazeV9/port_exceptions.c
+++ b/portable/GCC/MicroBlazeV9/port_exceptions.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV9/portasm.S b/portable/GCC/MicroBlazeV9/portasm.S
index 56825fe..6291439 100644
--- a/portable/GCC/MicroBlazeV9/portasm.S
+++ b/portable/GCC/MicroBlazeV9/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/MicroBlazeV9/portmacro.h b/portable/GCC/MicroBlazeV9/portmacro.h
index c481db7..8c7b3e9 100644
--- a/portable/GCC/MicroBlazeV9/portmacro.h
+++ b/portable/GCC/MicroBlazeV9/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/NiosII/port.c b/portable/GCC/NiosII/port.c
index 7a68b14..129a5a9 100644
--- a/portable/GCC/NiosII/port.c
+++ b/portable/GCC/NiosII/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/NiosII/port_asm.S b/portable/GCC/NiosII/port_asm.S
index a8429dc..14fad3d 100644
--- a/portable/GCC/NiosII/port_asm.S
+++ b/portable/GCC/NiosII/port_asm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/NiosII/portmacro.h b/portable/GCC/NiosII/portmacro.h
index 6af0c28..92f0e22 100644
--- a/portable/GCC/NiosII/portmacro.h
+++ b/portable/GCC/NiosII/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC405_Xilinx/FPU_Macros.h b/portable/GCC/PPC405_Xilinx/FPU_Macros.h
index 0196b4d..e5d74a1 100644
--- a/portable/GCC/PPC405_Xilinx/FPU_Macros.h
+++ b/portable/GCC/PPC405_Xilinx/FPU_Macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC405_Xilinx/port.c b/portable/GCC/PPC405_Xilinx/port.c
index af78c83..e691d6e 100644
--- a/portable/GCC/PPC405_Xilinx/port.c
+++ b/portable/GCC/PPC405_Xilinx/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC405_Xilinx/portasm.S b/portable/GCC/PPC405_Xilinx/portasm.S
index 0f2a68b..7ac35c3 100644
--- a/portable/GCC/PPC405_Xilinx/portasm.S
+++ b/portable/GCC/PPC405_Xilinx/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC405_Xilinx/portmacro.h b/portable/GCC/PPC405_Xilinx/portmacro.h
index 47172ad..2ed66a6 100644
--- a/portable/GCC/PPC405_Xilinx/portmacro.h
+++ b/portable/GCC/PPC405_Xilinx/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC440_Xilinx/FPU_Macros.h b/portable/GCC/PPC440_Xilinx/FPU_Macros.h
index 0196b4d..e5d74a1 100644
--- a/portable/GCC/PPC440_Xilinx/FPU_Macros.h
+++ b/portable/GCC/PPC440_Xilinx/FPU_Macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC440_Xilinx/port.c b/portable/GCC/PPC440_Xilinx/port.c
index 3e0655f..d0af7ab 100644
--- a/portable/GCC/PPC440_Xilinx/port.c
+++ b/portable/GCC/PPC440_Xilinx/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC440_Xilinx/portasm.S b/portable/GCC/PPC440_Xilinx/portasm.S
index 0f2a68b..7ac35c3 100644
--- a/portable/GCC/PPC440_Xilinx/portasm.S
+++ b/portable/GCC/PPC440_Xilinx/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/PPC440_Xilinx/portmacro.h b/portable/GCC/PPC440_Xilinx/portmacro.h
index 47172ad..2ed66a6 100644
--- a/portable/GCC/PPC440_Xilinx/portmacro.h
+++ b/portable/GCC/PPC440_Xilinx/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RISC-V/chip_specific_extensions/Pulpino_Vega_RV32M1RM/freertos_risc_v_chip_specific_extensions.h b/portable/GCC/RISC-V/chip_specific_extensions/Pulpino_Vega_RV32M1RM/freertos_risc_v_chip_specific_extensions.h
index 26c85c6..95ecc63 100644
--- a/portable/GCC/RISC-V/chip_specific_extensions/Pulpino_Vega_RV32M1RM/freertos_risc_v_chip_specific_extensions.h
+++ b/portable/GCC/RISC-V/chip_specific_extensions/Pulpino_Vega_RV32M1RM/freertos_risc_v_chip_specific_extensions.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h b/portable/GCC/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h
index 60d4c60..6845b7d 100644
--- a/portable/GCC/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h
+++ b/portable/GCC/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RISC-V/port.c b/portable/GCC/RISC-V/port.c
index c8b1315..5166acd 100644
--- a/portable/GCC/RISC-V/port.c
+++ b/portable/GCC/RISC-V/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RISC-V/portASM.S b/portable/GCC/RISC-V/portASM.S
index f55815c..1abd414 100644
--- a/portable/GCC/RISC-V/portASM.S
+++ b/portable/GCC/RISC-V/portASM.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RISC-V/portmacro.h b/portable/GCC/RISC-V/portmacro.h
index 63d0765..823a5c6 100644
--- a/portable/GCC/RISC-V/portmacro.h
+++ b/portable/GCC/RISC-V/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RL78/isr_support.h b/portable/GCC/RL78/isr_support.h
index af14c8d..23c741e 100644
--- a/portable/GCC/RL78/isr_support.h
+++ b/portable/GCC/RL78/isr_support.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RL78/port.c b/portable/GCC/RL78/port.c
index 78dc094..709e9ee 100644
--- a/portable/GCC/RL78/port.c
+++ b/portable/GCC/RL78/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RL78/portasm.S b/portable/GCC/RL78/portasm.S
index 0b15131..e465b6f 100644
--- a/portable/GCC/RL78/portasm.S
+++ b/portable/GCC/RL78/portasm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RL78/portmacro.h b/portable/GCC/RL78/portmacro.h
index 7aad6d2..1730b43 100644
--- a/portable/GCC/RL78/portmacro.h
+++ b/portable/GCC/RL78/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX100/port.c b/portable/GCC/RX100/port.c
index 9def9ae..55669ca 100644
--- a/portable/GCC/RX100/port.c
+++ b/portable/GCC/RX100/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX100/portmacro.h b/portable/GCC/RX100/portmacro.h
index 28b8f3d..685a8b9 100644
--- a/portable/GCC/RX100/portmacro.h
+++ b/portable/GCC/RX100/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX200/port.c b/portable/GCC/RX200/port.c
index 2ccbd47..b779833 100644
--- a/portable/GCC/RX200/port.c
+++ b/portable/GCC/RX200/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX200/portmacro.h b/portable/GCC/RX200/portmacro.h
index 0907475..fb46dc7 100644
--- a/portable/GCC/RX200/portmacro.h
+++ b/portable/GCC/RX200/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX600/port.c b/portable/GCC/RX600/port.c
index d90f0b2..d399efd 100644
--- a/portable/GCC/RX600/port.c
+++ b/portable/GCC/RX600/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX600/portmacro.h b/portable/GCC/RX600/portmacro.h
index 3010094..942c49a 100644
--- a/portable/GCC/RX600/portmacro.h
+++ b/portable/GCC/RX600/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX600v2/port.c b/portable/GCC/RX600v2/port.c
index 8c5ce08..8d5cbe2 100644
--- a/portable/GCC/RX600v2/port.c
+++ b/portable/GCC/RX600v2/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX600v2/portmacro.h b/portable/GCC/RX600v2/portmacro.h
index 3010094..942c49a 100644
--- a/portable/GCC/RX600v2/portmacro.h
+++ b/portable/GCC/RX600v2/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX700v3_DPFPU/port.c b/portable/GCC/RX700v3_DPFPU/port.c
index bc85762..4575c45 100644
--- a/portable/GCC/RX700v3_DPFPU/port.c
+++ b/portable/GCC/RX700v3_DPFPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/RX700v3_DPFPU/portmacro.h b/portable/GCC/RX700v3_DPFPU/portmacro.h
index 0e27db4..8e5c458 100644
--- a/portable/GCC/RX700v3_DPFPU/portmacro.h
+++ b/portable/GCC/RX700v3_DPFPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/STR75x/port.c b/portable/GCC/STR75x/port.c
index f10165a..936008a 100644
--- a/portable/GCC/STR75x/port.c
+++ b/portable/GCC/STR75x/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/STR75x/portISR.c b/portable/GCC/STR75x/portISR.c
index 340813d..449b6e8 100644
--- a/portable/GCC/STR75x/portISR.c
+++ b/portable/GCC/STR75x/portISR.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/STR75x/portmacro.h b/portable/GCC/STR75x/portmacro.h
index 5390914..b97c5ce 100644
--- a/portable/GCC/STR75x/portmacro.h
+++ b/portable/GCC/STR75x/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/TriCore_1782/port.c b/portable/GCC/TriCore_1782/port.c
index fb3cc35..9d76c2c 100644
--- a/portable/GCC/TriCore_1782/port.c
+++ b/portable/GCC/TriCore_1782/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/TriCore_1782/portmacro.h b/portable/GCC/TriCore_1782/portmacro.h
index 2430650..cb4fff1 100644
--- a/portable/GCC/TriCore_1782/portmacro.h
+++ b/portable/GCC/TriCore_1782/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/GCC/TriCore_1782/porttrap.c b/portable/GCC/TriCore_1782/porttrap.c
index 1dc8e60..9578048 100644
--- a/portable/GCC/TriCore_1782/porttrap.c
+++ b/portable/GCC/TriCore_1782/porttrap.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/78K0R/ISR_Support.h b/portable/IAR/78K0R/ISR_Support.h
index bac544a..0c064b8 100644
--- a/portable/IAR/78K0R/ISR_Support.h
+++ b/portable/IAR/78K0R/ISR_Support.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/78K0R/port.c b/portable/IAR/78K0R/port.c
index cd71d9b..dee51d6 100644
--- a/portable/IAR/78K0R/port.c
+++ b/portable/IAR/78K0R/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/78K0R/portasm.s26 b/portable/IAR/78K0R/portasm.s26
index eeee194..0fb14bd 100644
--- a/portable/IAR/78K0R/portasm.s26
+++ b/portable/IAR/78K0R/portasm.s26
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/78K0R/portmacro.h b/portable/IAR/78K0R/portmacro.h
index 8a3c899..8c24e48 100644
--- a/portable/IAR/78K0R/portmacro.h
+++ b/portable/IAR/78K0R/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA5_No_GIC/port.c b/portable/IAR/ARM_CA5_No_GIC/port.c
index 419e77f..281fc09 100644
--- a/portable/IAR/ARM_CA5_No_GIC/port.c
+++ b/portable/IAR/ARM_CA5_No_GIC/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA5_No_GIC/portASM.h b/portable/IAR/ARM_CA5_No_GIC/portASM.h
index 4502c0c..ceec40c 100644
--- a/portable/IAR/ARM_CA5_No_GIC/portASM.h
+++ b/portable/IAR/ARM_CA5_No_GIC/portASM.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA5_No_GIC/portASM.s b/portable/IAR/ARM_CA5_No_GIC/portASM.s
index 0b5069b..5bd4acc 100644
--- a/portable/IAR/ARM_CA5_No_GIC/portASM.s
+++ b/portable/IAR/ARM_CA5_No_GIC/portASM.s
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA5_No_GIC/portmacro.h b/portable/IAR/ARM_CA5_No_GIC/portmacro.h
index 9b3755d..ab1c862 100644
--- a/portable/IAR/ARM_CA5_No_GIC/portmacro.h
+++ b/portable/IAR/ARM_CA5_No_GIC/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA9/port.c b/portable/IAR/ARM_CA9/port.c
index c2e2e4a..7166f4f 100644
--- a/portable/IAR/ARM_CA9/port.c
+++ b/portable/IAR/ARM_CA9/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA9/portASM.h b/portable/IAR/ARM_CA9/portASM.h
index f2a429f..b812ba0 100644
--- a/portable/IAR/ARM_CA9/portASM.h
+++ b/portable/IAR/ARM_CA9/portASM.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA9/portASM.s b/portable/IAR/ARM_CA9/portASM.s
index ea6da29..efcc3c8 100644
--- a/portable/IAR/ARM_CA9/portASM.s
+++ b/portable/IAR/ARM_CA9/portASM.s
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CA9/portmacro.h b/portable/IAR/ARM_CA9/portmacro.h
index ccb365a..5fd04d0 100644
--- a/portable/IAR/ARM_CA9/portmacro.h
+++ b/portable/IAR/ARM_CA9/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM0/port.c b/portable/IAR/ARM_CM0/port.c
index 95bb957..36571fb 100644
--- a/portable/IAR/ARM_CM0/port.c
+++ b/portable/IAR/ARM_CM0/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM0/portasm.s b/portable/IAR/ARM_CM0/portasm.s
index a9865bd..06dc077 100644
--- a/portable/IAR/ARM_CM0/portasm.s
+++ b/portable/IAR/ARM_CM0/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM0/portmacro.h b/portable/IAR/ARM_CM0/portmacro.h
index 3c7431a..bcece2b 100644
--- a/portable/IAR/ARM_CM0/portmacro.h
+++ b/portable/IAR/ARM_CM0/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/non_secure/port.c b/portable/IAR/ARM_CM23/non_secure/port.c
index 7a066ae..5c5c7d8 100644
--- a/portable/IAR/ARM_CM23/non_secure/port.c
+++ b/portable/IAR/ARM_CM23/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/non_secure/portasm.h b/portable/IAR/ARM_CM23/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/IAR/ARM_CM23/non_secure/portasm.h
+++ b/portable/IAR/ARM_CM23/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/non_secure/portasm.s b/portable/IAR/ARM_CM23/non_secure/portasm.s
index eb825eb..27a97c9 100644
--- a/portable/IAR/ARM_CM23/non_secure/portasm.s
+++ b/portable/IAR/ARM_CM23/non_secure/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/non_secure/portmacro.h b/portable/IAR/ARM_CM23/non_secure/portmacro.h
index e980734..db5d4be 100644
--- a/portable/IAR/ARM_CM23/non_secure/portmacro.h
+++ b/portable/IAR/ARM_CM23/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_context.c b/portable/IAR/ARM_CM23/secure/secure_context.c
index 2b065cf..a0a85bd 100644
--- a/portable/IAR/ARM_CM23/secure/secure_context.c
+++ b/portable/IAR/ARM_CM23/secure/secure_context.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_context.h b/portable/IAR/ARM_CM23/secure/secure_context.h
index 03a9e4d..1167fbd 100644
--- a/portable/IAR/ARM_CM23/secure/secure_context.h
+++ b/portable/IAR/ARM_CM23/secure/secure_context.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_context_port.c b/portable/IAR/ARM_CM23/secure/secure_context_port.c
index 9da1aaf..9994032 100644
--- a/portable/IAR/ARM_CM23/secure/secure_context_port.c
+++ b/portable/IAR/ARM_CM23/secure/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_context_port_asm.s b/portable/IAR/ARM_CM23/secure/secure_context_port_asm.s
index 403f11b..8f47e5e 100644
--- a/portable/IAR/ARM_CM23/secure/secure_context_port_asm.s
+++ b/portable/IAR/ARM_CM23/secure/secure_context_port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_heap.c b/portable/IAR/ARM_CM23/secure/secure_heap.c
index ba90dba..6752f91 100644
--- a/portable/IAR/ARM_CM23/secure/secure_heap.c
+++ b/portable/IAR/ARM_CM23/secure/secure_heap.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_heap.h b/portable/IAR/ARM_CM23/secure/secure_heap.h
index 5e39834..29b00d1 100644
--- a/portable/IAR/ARM_CM23/secure/secure_heap.h
+++ b/portable/IAR/ARM_CM23/secure/secure_heap.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_init.c b/portable/IAR/ARM_CM23/secure/secure_init.c
index 84b9c7d..1fa482a 100644
--- a/portable/IAR/ARM_CM23/secure/secure_init.c
+++ b/portable/IAR/ARM_CM23/secure/secure_init.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_init.h b/portable/IAR/ARM_CM23/secure/secure_init.h
index 48559ae..70cbf34 100644
--- a/portable/IAR/ARM_CM23/secure/secure_init.h
+++ b/portable/IAR/ARM_CM23/secure/secure_init.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23/secure/secure_port_macros.h b/portable/IAR/ARM_CM23/secure/secure_port_macros.h
index b6efa1e..6d05b25 100644
--- a/portable/IAR/ARM_CM23/secure/secure_port_macros.h
+++ b/portable/IAR/ARM_CM23/secure/secure_port_macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23_NTZ/non_secure/port.c b/portable/IAR/ARM_CM23_NTZ/non_secure/port.c
index 7a066ae..5c5c7d8 100644
--- a/portable/IAR/ARM_CM23_NTZ/non_secure/port.c
+++ b/portable/IAR/ARM_CM23_NTZ/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.h b/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.h
+++ b/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.s b/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.s
index a87871b..915d1e9 100644
--- a/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.s
+++ b/portable/IAR/ARM_CM23_NTZ/non_secure/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM23_NTZ/non_secure/portmacro.h b/portable/IAR/ARM_CM23_NTZ/non_secure/portmacro.h
index a53f8b0..d047133 100644
--- a/portable/IAR/ARM_CM23_NTZ/non_secure/portmacro.h
+++ b/portable/IAR/ARM_CM23_NTZ/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM3/port.c b/portable/IAR/ARM_CM3/port.c
index 7206661..8ddfb2d 100644
--- a/portable/IAR/ARM_CM3/port.c
+++ b/portable/IAR/ARM_CM3/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM3/portasm.s b/portable/IAR/ARM_CM3/portasm.s
index 077567c..adafb19 100644
--- a/portable/IAR/ARM_CM3/portasm.s
+++ b/portable/IAR/ARM_CM3/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM3/portmacro.h b/portable/IAR/ARM_CM3/portmacro.h
index 8cc8760..32d2771 100644
--- a/portable/IAR/ARM_CM3/portmacro.h
+++ b/portable/IAR/ARM_CM3/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/non_secure/port.c b/portable/IAR/ARM_CM33/non_secure/port.c
index 7a066ae..5c5c7d8 100644
--- a/portable/IAR/ARM_CM33/non_secure/port.c
+++ b/portable/IAR/ARM_CM33/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/non_secure/portasm.h b/portable/IAR/ARM_CM33/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/IAR/ARM_CM33/non_secure/portasm.h
+++ b/portable/IAR/ARM_CM33/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/non_secure/portasm.s b/portable/IAR/ARM_CM33/non_secure/portasm.s
index a66a958..25135f5 100644
--- a/portable/IAR/ARM_CM33/non_secure/portasm.s
+++ b/portable/IAR/ARM_CM33/non_secure/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/non_secure/portmacro.h b/portable/IAR/ARM_CM33/non_secure/portmacro.h
index a00e840..dcdd0f6 100644
--- a/portable/IAR/ARM_CM33/non_secure/portmacro.h
+++ b/portable/IAR/ARM_CM33/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_context.c b/portable/IAR/ARM_CM33/secure/secure_context.c
index 2b065cf..a0a85bd 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context.c
+++ b/portable/IAR/ARM_CM33/secure/secure_context.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_context.h b/portable/IAR/ARM_CM33/secure/secure_context.h
index 03a9e4d..1167fbd 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context.h
+++ b/portable/IAR/ARM_CM33/secure/secure_context.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_context_port.c b/portable/IAR/ARM_CM33/secure/secure_context_port.c
index 9da1aaf..9994032 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context_port.c
+++ b/portable/IAR/ARM_CM33/secure/secure_context_port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s b/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s
index 86322ff..b4934ad 100644
--- a/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s
+++ b/portable/IAR/ARM_CM33/secure/secure_context_port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_heap.c b/portable/IAR/ARM_CM33/secure/secure_heap.c
index ba90dba..6752f91 100644
--- a/portable/IAR/ARM_CM33/secure/secure_heap.c
+++ b/portable/IAR/ARM_CM33/secure/secure_heap.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_heap.h b/portable/IAR/ARM_CM33/secure/secure_heap.h
index 5e39834..29b00d1 100644
--- a/portable/IAR/ARM_CM33/secure/secure_heap.h
+++ b/portable/IAR/ARM_CM33/secure/secure_heap.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_init.c b/portable/IAR/ARM_CM33/secure/secure_init.c
index 84b9c7d..1fa482a 100644
--- a/portable/IAR/ARM_CM33/secure/secure_init.c
+++ b/portable/IAR/ARM_CM33/secure/secure_init.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_init.h b/portable/IAR/ARM_CM33/secure/secure_init.h
index 48559ae..70cbf34 100644
--- a/portable/IAR/ARM_CM33/secure/secure_init.h
+++ b/portable/IAR/ARM_CM33/secure/secure_init.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33/secure/secure_port_macros.h b/portable/IAR/ARM_CM33/secure/secure_port_macros.h
index b6efa1e..6d05b25 100644
--- a/portable/IAR/ARM_CM33/secure/secure_port_macros.h
+++ b/portable/IAR/ARM_CM33/secure/secure_port_macros.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33_NTZ/non_secure/port.c b/portable/IAR/ARM_CM33_NTZ/non_secure/port.c
index 7a066ae..5c5c7d8 100644
--- a/portable/IAR/ARM_CM33_NTZ/non_secure/port.c
+++ b/portable/IAR/ARM_CM33_NTZ/non_secure/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.h b/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.h
index 5916f43..4392259 100644
--- a/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.h
+++ b/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.s b/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.s
index 94ba354..a2e877d 100644
--- a/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.s
+++ b/portable/IAR/ARM_CM33_NTZ/non_secure/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM33_NTZ/non_secure/portmacro.h b/portable/IAR/ARM_CM33_NTZ/non_secure/portmacro.h
index a00e840..dcdd0f6 100644
--- a/portable/IAR/ARM_CM33_NTZ/non_secure/portmacro.h
+++ b/portable/IAR/ARM_CM33_NTZ/non_secure/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM4F/port.c b/portable/IAR/ARM_CM4F/port.c
index e7e277a..0b8715a 100644
--- a/portable/IAR/ARM_CM4F/port.c
+++ b/portable/IAR/ARM_CM4F/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM4F/portasm.s b/portable/IAR/ARM_CM4F/portasm.s
index 0fb98e6..425c33d 100644
--- a/portable/IAR/ARM_CM4F/portasm.s
+++ b/portable/IAR/ARM_CM4F/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM4F/portmacro.h b/portable/IAR/ARM_CM4F/portmacro.h
index a280f09..1749166 100644
--- a/portable/IAR/ARM_CM4F/portmacro.h
+++ b/portable/IAR/ARM_CM4F/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM4F_MPU/port.c b/portable/IAR/ARM_CM4F_MPU/port.c
index a77b627..287bb6a 100644
--- a/portable/IAR/ARM_CM4F_MPU/port.c
+++ b/portable/IAR/ARM_CM4F_MPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM4F_MPU/portasm.s b/portable/IAR/ARM_CM4F_MPU/portasm.s
index a740f6d..5751b2e 100644
--- a/portable/IAR/ARM_CM4F_MPU/portasm.s
+++ b/portable/IAR/ARM_CM4F_MPU/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM4F_MPU/portmacro.h b/portable/IAR/ARM_CM4F_MPU/portmacro.h
index e41c646..13aec21 100644
--- a/portable/IAR/ARM_CM4F_MPU/portmacro.h
+++ b/portable/IAR/ARM_CM4F_MPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM7/r0p1/port.c b/portable/IAR/ARM_CM7/r0p1/port.c
index 2f2792a..f13b675 100644
--- a/portable/IAR/ARM_CM7/r0p1/port.c
+++ b/portable/IAR/ARM_CM7/r0p1/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM7/r0p1/portasm.s b/portable/IAR/ARM_CM7/r0p1/portasm.s
index 34535a1..83197c2 100644
--- a/portable/IAR/ARM_CM7/r0p1/portasm.s
+++ b/portable/IAR/ARM_CM7/r0p1/portasm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CM7/r0p1/portmacro.h b/portable/IAR/ARM_CM7/r0p1/portmacro.h
index c5a860d..a83829f 100644
--- a/portable/IAR/ARM_CM7/r0p1/portmacro.h
+++ b/portable/IAR/ARM_CM7/r0p1/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CRx_No_GIC/port.c b/portable/IAR/ARM_CRx_No_GIC/port.c
index 53760b8..89e8b18 100644
--- a/portable/IAR/ARM_CRx_No_GIC/port.c
+++ b/portable/IAR/ARM_CRx_No_GIC/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CRx_No_GIC/portASM.s b/portable/IAR/ARM_CRx_No_GIC/portASM.s
index 777b27b..cb49299 100644
--- a/portable/IAR/ARM_CRx_No_GIC/portASM.s
+++ b/portable/IAR/ARM_CRx_No_GIC/portASM.s
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ARM_CRx_No_GIC/portmacro.h b/portable/IAR/ARM_CRx_No_GIC/portmacro.h
index 84124b5..6775951 100644
--- a/portable/IAR/ARM_CRx_No_GIC/portmacro.h
+++ b/portable/IAR/ARM_CRx_No_GIC/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ATMega323/port.c b/portable/IAR/ATMega323/port.c
index a706cb7..68a0e42 100644
--- a/portable/IAR/ATMega323/port.c
+++ b/portable/IAR/ATMega323/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ATMega323/portmacro.h b/portable/IAR/ATMega323/portmacro.h
index 8fd90fc..021baae 100644
--- a/portable/IAR/ATMega323/portmacro.h
+++ b/portable/IAR/ATMega323/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/ATMega323/portmacro.s90 b/portable/IAR/ATMega323/portmacro.s90
index 749234b..ee9bd24 100644
--- a/portable/IAR/ATMega323/portmacro.s90
+++ b/portable/IAR/ATMega323/portmacro.s90
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_AVRDx/port.c b/portable/IAR/AVR_AVRDx/port.c
index d472083..8d8f223 100644
--- a/portable/IAR/AVR_AVRDx/port.c
+++ b/portable/IAR/AVR_AVRDx/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_AVRDx/porthardware.h b/portable/IAR/AVR_AVRDx/porthardware.h
index 6ca6b87..c313e0c 100644
--- a/portable/IAR/AVR_AVRDx/porthardware.h
+++ b/portable/IAR/AVR_AVRDx/porthardware.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_AVRDx/portmacro.h b/portable/IAR/AVR_AVRDx/portmacro.h
index 8bc0a0a..d02c691 100644
--- a/portable/IAR/AVR_AVRDx/portmacro.h
+++ b/portable/IAR/AVR_AVRDx/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_AVRDx/portmacro.s90 b/portable/IAR/AVR_AVRDx/portmacro.s90
index 7482f39..d5daa29 100644
--- a/portable/IAR/AVR_AVRDx/portmacro.s90
+++ b/portable/IAR/AVR_AVRDx/portmacro.s90
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_Mega0/port.c b/portable/IAR/AVR_Mega0/port.c
index 62e9994..4dc8ab3 100644
--- a/portable/IAR/AVR_Mega0/port.c
+++ b/portable/IAR/AVR_Mega0/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_Mega0/porthardware.h b/portable/IAR/AVR_Mega0/porthardware.h
index c5c971e..c734144 100644
--- a/portable/IAR/AVR_Mega0/porthardware.h
+++ b/portable/IAR/AVR_Mega0/porthardware.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_Mega0/portmacro.h b/portable/IAR/AVR_Mega0/portmacro.h
index 8bc0a0a..d02c691 100644
--- a/portable/IAR/AVR_Mega0/portmacro.h
+++ b/portable/IAR/AVR_Mega0/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AVR_Mega0/portmacro.s90 b/portable/IAR/AVR_Mega0/portmacro.s90
index cfbca69..7ec1aee 100644
--- a/portable/IAR/AVR_Mega0/portmacro.s90
+++ b/portable/IAR/AVR_Mega0/portmacro.s90
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM7S64/ISR_Support.h b/portable/IAR/AtmelSAM7S64/ISR_Support.h
index a67afd2..a2ecb48 100644
--- a/portable/IAR/AtmelSAM7S64/ISR_Support.h
+++ b/portable/IAR/AtmelSAM7S64/ISR_Support.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM7S64/port.c b/portable/IAR/AtmelSAM7S64/port.c
index db03a2a..39242cd 100644
--- a/portable/IAR/AtmelSAM7S64/port.c
+++ b/portable/IAR/AtmelSAM7S64/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM7S64/portasm.s79 b/portable/IAR/AtmelSAM7S64/portasm.s79
index 72238d0..d732d8e 100644
--- a/portable/IAR/AtmelSAM7S64/portasm.s79
+++ b/portable/IAR/AtmelSAM7S64/portasm.s79
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM7S64/portmacro.h b/portable/IAR/AtmelSAM7S64/portmacro.h
index cabf6ac..e1f465c 100644
--- a/portable/IAR/AtmelSAM7S64/portmacro.h
+++ b/portable/IAR/AtmelSAM7S64/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM9XE/ISR_Support.h b/portable/IAR/AtmelSAM9XE/ISR_Support.h
index 6678e85..6fabc47 100644
--- a/portable/IAR/AtmelSAM9XE/ISR_Support.h
+++ b/portable/IAR/AtmelSAM9XE/ISR_Support.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM9XE/port.c b/portable/IAR/AtmelSAM9XE/port.c
index e346453..100f740 100644
--- a/portable/IAR/AtmelSAM9XE/port.c
+++ b/portable/IAR/AtmelSAM9XE/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM9XE/portasm.s79 b/portable/IAR/AtmelSAM9XE/portasm.s79
index 16fa6f6..0beaa64 100644
--- a/portable/IAR/AtmelSAM9XE/portasm.s79
+++ b/portable/IAR/AtmelSAM9XE/portasm.s79
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/AtmelSAM9XE/portmacro.h b/portable/IAR/AtmelSAM9XE/portmacro.h
index 2c7793e..b0025e4 100644
--- a/portable/IAR/AtmelSAM9XE/portmacro.h
+++ b/portable/IAR/AtmelSAM9XE/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/LPC2000/ISR_Support.h b/portable/IAR/LPC2000/ISR_Support.h
index a67afd2..a2ecb48 100644
--- a/portable/IAR/LPC2000/ISR_Support.h
+++ b/portable/IAR/LPC2000/ISR_Support.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/LPC2000/port.c b/portable/IAR/LPC2000/port.c
index 743452b..823833c 100644
--- a/portable/IAR/LPC2000/port.c
+++ b/portable/IAR/LPC2000/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/LPC2000/portasm.s79 b/portable/IAR/LPC2000/portasm.s79
index 45e451f..b819d75 100644
--- a/portable/IAR/LPC2000/portasm.s79
+++ b/portable/IAR/LPC2000/portasm.s79
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/LPC2000/portmacro.h b/portable/IAR/LPC2000/portmacro.h
index a41217b..cf4a433 100644
--- a/portable/IAR/LPC2000/portmacro.h
+++ b/portable/IAR/LPC2000/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430/port.c b/portable/IAR/MSP430/port.c
index e3500e9..73a6bdf 100644
--- a/portable/IAR/MSP430/port.c
+++ b/portable/IAR/MSP430/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430/portasm.h b/portable/IAR/MSP430/portasm.h
index a859035..2a578b2 100644
--- a/portable/IAR/MSP430/portasm.h
+++ b/portable/IAR/MSP430/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430/portext.s43 b/portable/IAR/MSP430/portext.s43
index e385479..1ac0443 100644
--- a/portable/IAR/MSP430/portext.s43
+++ b/portable/IAR/MSP430/portext.s43
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430/portmacro.h b/portable/IAR/MSP430/portmacro.h
index b5473e3..d0e6af1 100644
--- a/portable/IAR/MSP430/portmacro.h
+++ b/portable/IAR/MSP430/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430X/data_model.h b/portable/IAR/MSP430X/data_model.h
index 6716c8f..5782b8f 100644
--- a/portable/IAR/MSP430X/data_model.h
+++ b/portable/IAR/MSP430X/data_model.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430X/port.c b/portable/IAR/MSP430X/port.c
index fbfc425..2fb5e3c 100644
--- a/portable/IAR/MSP430X/port.c
+++ b/portable/IAR/MSP430X/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430X/portext.s43 b/portable/IAR/MSP430X/portext.s43
index 6394986..7214a31 100644
--- a/portable/IAR/MSP430X/portext.s43
+++ b/portable/IAR/MSP430X/portext.s43
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/MSP430X/portmacro.h b/portable/IAR/MSP430X/portmacro.h
index ed78ba2..950503b 100644
--- a/portable/IAR/MSP430X/portmacro.h
+++ b/portable/IAR/MSP430X/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h b/portable/IAR/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h
index 304c240..795a991 100644
--- a/portable/IAR/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h
+++ b/portable/IAR/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RISC-V/port.c b/portable/IAR/RISC-V/port.c
index e40feb2..2c15cd0 100644
--- a/portable/IAR/RISC-V/port.c
+++ b/portable/IAR/RISC-V/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RISC-V/portASM.s b/portable/IAR/RISC-V/portASM.s
index 329f0cb..2f76035 100644
--- a/portable/IAR/RISC-V/portASM.s
+++ b/portable/IAR/RISC-V/portASM.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RISC-V/portmacro.h b/portable/IAR/RISC-V/portmacro.h
index 1de2778..916dce6 100644
--- a/portable/IAR/RISC-V/portmacro.h
+++ b/portable/IAR/RISC-V/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RL78/ISR_Support.h b/portable/IAR/RL78/ISR_Support.h
index ef4d7c4..7bd975a 100644
--- a/portable/IAR/RL78/ISR_Support.h
+++ b/portable/IAR/RL78/ISR_Support.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RL78/port.c b/portable/IAR/RL78/port.c
index 7456733..9467cf5 100644
--- a/portable/IAR/RL78/port.c
+++ b/portable/IAR/RL78/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RL78/portasm.s87 b/portable/IAR/RL78/portasm.s87
index d92db10..3eacd1e 100644
--- a/portable/IAR/RL78/portasm.s87
+++ b/portable/IAR/RL78/portasm.s87
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RL78/portmacro.h b/portable/IAR/RL78/portmacro.h
index c70bdca..b020db3 100644
--- a/portable/IAR/RL78/portmacro.h
+++ b/portable/IAR/RL78/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX100/port.c b/portable/IAR/RX100/port.c
index bf7e689..dced00d 100644
--- a/portable/IAR/RX100/port.c
+++ b/portable/IAR/RX100/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX100/port_asm.s b/portable/IAR/RX100/port_asm.s
index b1b7c32..9f4b56a 100644
--- a/portable/IAR/RX100/port_asm.s
+++ b/portable/IAR/RX100/port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX100/portmacro.h b/portable/IAR/RX100/portmacro.h
index ee516cf..1491572 100644
--- a/portable/IAR/RX100/portmacro.h
+++ b/portable/IAR/RX100/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX600/port.c b/portable/IAR/RX600/port.c
index 5368ef7..5628933 100644
--- a/portable/IAR/RX600/port.c
+++ b/portable/IAR/RX600/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX600/port_asm.s b/portable/IAR/RX600/port_asm.s
index 20b074f..57a2d69 100644
--- a/portable/IAR/RX600/port_asm.s
+++ b/portable/IAR/RX600/port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX600/portmacro.h b/portable/IAR/RX600/portmacro.h
index 7ea974e..0b47bab 100644
--- a/portable/IAR/RX600/portmacro.h
+++ b/portable/IAR/RX600/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX700v3_DPFPU/port.c b/portable/IAR/RX700v3_DPFPU/port.c
index a17ec4d..961147c 100644
--- a/portable/IAR/RX700v3_DPFPU/port.c
+++ b/portable/IAR/RX700v3_DPFPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RX700v3_DPFPU/portmacro.h b/portable/IAR/RX700v3_DPFPU/portmacro.h
index c595d62..dfee9a8 100644
--- a/portable/IAR/RX700v3_DPFPU/portmacro.h
+++ b/portable/IAR/RX700v3_DPFPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RXv2/port.c b/portable/IAR/RXv2/port.c
index 233448e..33bd2d0 100644
--- a/portable/IAR/RXv2/port.c
+++ b/portable/IAR/RXv2/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RXv2/port_asm.s b/portable/IAR/RXv2/port_asm.s
index deb400b..91267bb 100644
--- a/portable/IAR/RXv2/port_asm.s
+++ b/portable/IAR/RXv2/port_asm.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/RXv2/portmacro.h b/portable/IAR/RXv2/portmacro.h
index 2c0556f..5149cb1 100644
--- a/portable/IAR/RXv2/portmacro.h
+++ b/portable/IAR/RXv2/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR71x/ISR_Support.h b/portable/IAR/STR71x/ISR_Support.h
index a67afd2..a2ecb48 100644
--- a/portable/IAR/STR71x/ISR_Support.h
+++ b/portable/IAR/STR71x/ISR_Support.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR71x/port.c b/portable/IAR/STR71x/port.c
index 6ffa3c2..ba9bb9b 100644
--- a/portable/IAR/STR71x/port.c
+++ b/portable/IAR/STR71x/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR71x/portasm.s79 b/portable/IAR/STR71x/portasm.s79
index 56eec8c..087d25b 100644
--- a/portable/IAR/STR71x/portasm.s79
+++ b/portable/IAR/STR71x/portasm.s79
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR71x/portmacro.h b/portable/IAR/STR71x/portmacro.h
index 639ee93..06b9d66 100644
--- a/portable/IAR/STR71x/portmacro.h
+++ b/portable/IAR/STR71x/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR75x/ISR_Support.h b/portable/IAR/STR75x/ISR_Support.h
index a67afd2..a2ecb48 100644
--- a/portable/IAR/STR75x/ISR_Support.h
+++ b/portable/IAR/STR75x/ISR_Support.h
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR75x/port.c b/portable/IAR/STR75x/port.c
index 930a61c..a376434 100644
--- a/portable/IAR/STR75x/port.c
+++ b/portable/IAR/STR75x/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR75x/portasm.s79 b/portable/IAR/STR75x/portasm.s79
index 989e6bf..21ba52f 100644
--- a/portable/IAR/STR75x/portasm.s79
+++ b/portable/IAR/STR75x/portasm.s79
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR75x/portmacro.h b/portable/IAR/STR75x/portmacro.h
index b7921b8..235ca58 100644
--- a/portable/IAR/STR75x/portmacro.h
+++ b/portable/IAR/STR75x/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR91x/ISR_Support.h b/portable/IAR/STR91x/ISR_Support.h
index 08fdbdc..e8930cf 100644
--- a/portable/IAR/STR91x/ISR_Support.h
+++ b/portable/IAR/STR91x/ISR_Support.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR91x/port.c b/portable/IAR/STR91x/port.c
index bef3d25..a3f5039 100644
--- a/portable/IAR/STR91x/port.c
+++ b/portable/IAR/STR91x/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR91x/portasm.s79 b/portable/IAR/STR91x/portasm.s79
index 6f16422..a5d0600 100644
--- a/portable/IAR/STR91x/portasm.s79
+++ b/portable/IAR/STR91x/portasm.s79
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/STR91x/portmacro.h b/portable/IAR/STR91x/portmacro.h
index 95decfc..0320e2a 100644
--- a/portable/IAR/STR91x/portmacro.h
+++ b/portable/IAR/STR91x/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/V850ES/ISR_Support.h b/portable/IAR/V850ES/ISR_Support.h
index c2265ab..68560aa 100644
--- a/portable/IAR/V850ES/ISR_Support.h
+++ b/portable/IAR/V850ES/ISR_Support.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/V850ES/port.c b/portable/IAR/V850ES/port.c
index 3d8cbfe..2857ad1 100644
--- a/portable/IAR/V850ES/port.c
+++ b/portable/IAR/V850ES/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/V850ES/portasm.s85 b/portable/IAR/V850ES/portasm.s85
index 6c20996..01e58b5 100644
--- a/portable/IAR/V850ES/portasm.s85
+++ b/portable/IAR/V850ES/portasm.s85
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/V850ES/portasm_Fx3.s85 b/portable/IAR/V850ES/portasm_Fx3.s85
index dd395cc..9070d2b 100644
--- a/portable/IAR/V850ES/portasm_Fx3.s85
+++ b/portable/IAR/V850ES/portasm_Fx3.s85
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/V850ES/portasm_Hx2.s85 b/portable/IAR/V850ES/portasm_Hx2.s85
index aff0f7d..63b8501 100644
--- a/portable/IAR/V850ES/portasm_Hx2.s85
+++ b/portable/IAR/V850ES/portasm_Hx2.s85
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/IAR/V850ES/portmacro.h b/portable/IAR/V850ES/portmacro.h
index d85ec43..4b113b5 100644
--- a/portable/IAR/V850ES/portmacro.h
+++ b/portable/IAR/V850ES/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC18F/port.c b/portable/MPLAB/PIC18F/port.c
index 994dbb9..a5e4775 100644
--- a/portable/MPLAB/PIC18F/port.c
+++ b/portable/MPLAB/PIC18F/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC18F/portmacro.h b/portable/MPLAB/PIC18F/portmacro.h
index d7a9e8a..1cbf5b1 100644
--- a/portable/MPLAB/PIC18F/portmacro.h
+++ b/portable/MPLAB/PIC18F/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC24_dsPIC/port.c b/portable/MPLAB/PIC24_dsPIC/port.c
index f891895..2e6b534 100644
--- a/portable/MPLAB/PIC24_dsPIC/port.c
+++ b/portable/MPLAB/PIC24_dsPIC/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC24_dsPIC/portasm_PIC24.S b/portable/MPLAB/PIC24_dsPIC/portasm_PIC24.S
index e33b5b3..228f955 100644
--- a/portable/MPLAB/PIC24_dsPIC/portasm_PIC24.S
+++ b/portable/MPLAB/PIC24_dsPIC/portasm_PIC24.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC24_dsPIC/portasm_dsPIC.S b/portable/MPLAB/PIC24_dsPIC/portasm_dsPIC.S
index ec15e35..258b0a1 100644
--- a/portable/MPLAB/PIC24_dsPIC/portasm_dsPIC.S
+++ b/portable/MPLAB/PIC24_dsPIC/portasm_dsPIC.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC24_dsPIC/portmacro.h b/portable/MPLAB/PIC24_dsPIC/portmacro.h
index 0051818..eaf816d 100644
--- a/portable/MPLAB/PIC24_dsPIC/portmacro.h
+++ b/portable/MPLAB/PIC24_dsPIC/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MEC14xx/ISR_Support.h b/portable/MPLAB/PIC32MEC14xx/ISR_Support.h
index 26f4883..0c3e417 100644
--- a/portable/MPLAB/PIC32MEC14xx/ISR_Support.h
+++ b/portable/MPLAB/PIC32MEC14xx/ISR_Support.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MEC14xx/port.c b/portable/MPLAB/PIC32MEC14xx/port.c
index c25579b..21b0158 100644
--- a/portable/MPLAB/PIC32MEC14xx/port.c
+++ b/portable/MPLAB/PIC32MEC14xx/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MEC14xx/port_asm.S b/portable/MPLAB/PIC32MEC14xx/port_asm.S
index be73526..2268260 100644
--- a/portable/MPLAB/PIC32MEC14xx/port_asm.S
+++ b/portable/MPLAB/PIC32MEC14xx/port_asm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MEC14xx/portmacro.h b/portable/MPLAB/PIC32MEC14xx/portmacro.h
index cb0acf6..892882d 100644
--- a/portable/MPLAB/PIC32MEC14xx/portmacro.h
+++ b/portable/MPLAB/PIC32MEC14xx/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MX/ISR_Support.h b/portable/MPLAB/PIC32MX/ISR_Support.h
index d0ae197..3754685 100644
--- a/portable/MPLAB/PIC32MX/ISR_Support.h
+++ b/portable/MPLAB/PIC32MX/ISR_Support.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MX/port.c b/portable/MPLAB/PIC32MX/port.c
index d6876c5..0323e47 100644
--- a/portable/MPLAB/PIC32MX/port.c
+++ b/portable/MPLAB/PIC32MX/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MX/port_asm.S b/portable/MPLAB/PIC32MX/port_asm.S
index 3b87516..33082b1 100644
--- a/portable/MPLAB/PIC32MX/port_asm.S
+++ b/portable/MPLAB/PIC32MX/port_asm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MX/portmacro.h b/portable/MPLAB/PIC32MX/portmacro.h
index 7a3b9aa..aa7b346 100644
--- a/portable/MPLAB/PIC32MX/portmacro.h
+++ b/portable/MPLAB/PIC32MX/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MZ/ISR_Support.h b/portable/MPLAB/PIC32MZ/ISR_Support.h
index 1734318..0f53fa5 100644
--- a/portable/MPLAB/PIC32MZ/ISR_Support.h
+++ b/portable/MPLAB/PIC32MZ/ISR_Support.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MZ/port.c b/portable/MPLAB/PIC32MZ/port.c
index 2e78c32..8962da4 100644
--- a/portable/MPLAB/PIC32MZ/port.c
+++ b/portable/MPLAB/PIC32MZ/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MZ/port_asm.S b/portable/MPLAB/PIC32MZ/port_asm.S
index 3eb0319..961049b 100644
--- a/portable/MPLAB/PIC32MZ/port_asm.S
+++ b/portable/MPLAB/PIC32MZ/port_asm.S
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MPLAB/PIC32MZ/portmacro.h b/portable/MPLAB/PIC32MZ/portmacro.h
index 86fe627..ad55dd4 100644
--- a/portable/MPLAB/PIC32MZ/portmacro.h
+++ b/portable/MPLAB/PIC32MZ/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MSVC-MingW/port.c b/portable/MSVC-MingW/port.c
index 28dbc2c..212183b 100644
--- a/portable/MSVC-MingW/port.c
+++ b/portable/MSVC-MingW/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MSVC-MingW/portmacro.h b/portable/MSVC-MingW/portmacro.h
index 2278f35..298317e 100644
--- a/portable/MSVC-MingW/portmacro.h
+++ b/portable/MSVC-MingW/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MemMang/heap_1.c b/portable/MemMang/heap_1.c
index e0e7fa6..03b701b 100644
--- a/portable/MemMang/heap_1.c
+++ b/portable/MemMang/heap_1.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MemMang/heap_2.c b/portable/MemMang/heap_2.c
index 7ad7753..bc1eafb 100644
--- a/portable/MemMang/heap_2.c
+++ b/portable/MemMang/heap_2.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MemMang/heap_3.c b/portable/MemMang/heap_3.c
index 5cf250d..5877819 100644
--- a/portable/MemMang/heap_3.c
+++ b/portable/MemMang/heap_3.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MemMang/heap_4.c b/portable/MemMang/heap_4.c
index 0ed5a93..526287a 100644
--- a/portable/MemMang/heap_4.c
+++ b/portable/MemMang/heap_4.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MemMang/heap_5.c b/portable/MemMang/heap_5.c
index 46b7fad..dc397da 100644
--- a/portable/MemMang/heap_5.c
+++ b/portable/MemMang/heap_5.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MikroC/ARM_CM4F/port.c b/portable/MikroC/ARM_CM4F/port.c
index e8fb490..159499c 100644
--- a/portable/MikroC/ARM_CM4F/port.c
+++ b/portable/MikroC/ARM_CM4F/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/MikroC/ARM_CM4F/portmacro.h b/portable/MikroC/ARM_CM4F/portmacro.h
index 1d936c4..860432c 100644
--- a/portable/MikroC/ARM_CM4F/portmacro.h
+++ b/portable/MikroC/ARM_CM4F/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Paradigm/Tern_EE/large_untested/port.c b/portable/Paradigm/Tern_EE/large_untested/port.c
index be943da..8c7d85f 100644
--- a/portable/Paradigm/Tern_EE/large_untested/port.c
+++ b/portable/Paradigm/Tern_EE/large_untested/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Paradigm/Tern_EE/large_untested/portasm.h b/portable/Paradigm/Tern_EE/large_untested/portasm.h
index 4b04485..633b30c 100644
--- a/portable/Paradigm/Tern_EE/large_untested/portasm.h
+++ b/portable/Paradigm/Tern_EE/large_untested/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Paradigm/Tern_EE/large_untested/portmacro.h b/portable/Paradigm/Tern_EE/large_untested/portmacro.h
index ec9231e..4be96a4 100644
--- a/portable/Paradigm/Tern_EE/large_untested/portmacro.h
+++ b/portable/Paradigm/Tern_EE/large_untested/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Paradigm/Tern_EE/small/port.c b/portable/Paradigm/Tern_EE/small/port.c
index 34b4157..17faa6f 100644
--- a/portable/Paradigm/Tern_EE/small/port.c
+++ b/portable/Paradigm/Tern_EE/small/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Paradigm/Tern_EE/small/portasm.h b/portable/Paradigm/Tern_EE/small/portasm.h
index 1cfd7e7..a34c2af 100644
--- a/portable/Paradigm/Tern_EE/small/portasm.h
+++ b/portable/Paradigm/Tern_EE/small/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Paradigm/Tern_EE/small/portmacro.h b/portable/Paradigm/Tern_EE/small/portmacro.h
index fdbc329..d2d4b5d 100644
--- a/portable/Paradigm/Tern_EE/small/portmacro.h
+++ b/portable/Paradigm/Tern_EE/small/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM7_LPC21xx/port.c b/portable/RVDS/ARM7_LPC21xx/port.c
index 82736ac..07bd214 100644
--- a/portable/RVDS/ARM7_LPC21xx/port.c
+++ b/portable/RVDS/ARM7_LPC21xx/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM7_LPC21xx/portASM.s b/portable/RVDS/ARM7_LPC21xx/portASM.s
index efb4fdf..afe9ff5 100644
--- a/portable/RVDS/ARM7_LPC21xx/portASM.s
+++ b/portable/RVDS/ARM7_LPC21xx/portASM.s
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM7_LPC21xx/portmacro.h b/portable/RVDS/ARM7_LPC21xx/portmacro.h
index 76ff19d..f984597 100644
--- a/portable/RVDS/ARM7_LPC21xx/portmacro.h
+++ b/portable/RVDS/ARM7_LPC21xx/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM7_LPC21xx/portmacro.inc b/portable/RVDS/ARM7_LPC21xx/portmacro.inc
index 13d402a..fb48b1b 100644
--- a/portable/RVDS/ARM7_LPC21xx/portmacro.inc
+++ b/portable/RVDS/ARM7_LPC21xx/portmacro.inc
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CA9/port.c b/portable/RVDS/ARM_CA9/port.c
index 412661b..3773c5c 100644
--- a/portable/RVDS/ARM_CA9/port.c
+++ b/portable/RVDS/ARM_CA9/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CA9/portASM.s b/portable/RVDS/ARM_CA9/portASM.s
index 40ffd0e..9aeeb34 100644
--- a/portable/RVDS/ARM_CA9/portASM.s
+++ b/portable/RVDS/ARM_CA9/portASM.s
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CA9/portmacro.h b/portable/RVDS/ARM_CA9/portmacro.h
index 81167e4..a7dca32 100644
--- a/portable/RVDS/ARM_CA9/portmacro.h
+++ b/portable/RVDS/ARM_CA9/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CA9/portmacro.inc b/portable/RVDS/ARM_CA9/portmacro.inc
index 008d47a..a770b24 100644
--- a/portable/RVDS/ARM_CA9/portmacro.inc
+++ b/portable/RVDS/ARM_CA9/portmacro.inc
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM0/port.c b/portable/RVDS/ARM_CM0/port.c
index c8cac2b..19ee426 100644
--- a/portable/RVDS/ARM_CM0/port.c
+++ b/portable/RVDS/ARM_CM0/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM0/portmacro.h b/portable/RVDS/ARM_CM0/portmacro.h
index 9058226..a562bdb 100644
--- a/portable/RVDS/ARM_CM0/portmacro.h
+++ b/portable/RVDS/ARM_CM0/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM3/port.c b/portable/RVDS/ARM_CM3/port.c
index 9d93326..c4c206c 100644
--- a/portable/RVDS/ARM_CM3/port.c
+++ b/portable/RVDS/ARM_CM3/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM3/portmacro.h b/portable/RVDS/ARM_CM3/portmacro.h
index 87fafb9..bb8ee24 100644
--- a/portable/RVDS/ARM_CM3/portmacro.h
+++ b/portable/RVDS/ARM_CM3/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM4F/port.c b/portable/RVDS/ARM_CM4F/port.c
index 7f5b7b5..900ed90 100644
--- a/portable/RVDS/ARM_CM4F/port.c
+++ b/portable/RVDS/ARM_CM4F/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM4F/portmacro.h b/portable/RVDS/ARM_CM4F/portmacro.h
index 327a015..daf6923 100644
--- a/portable/RVDS/ARM_CM4F/portmacro.h
+++ b/portable/RVDS/ARM_CM4F/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM4_MPU/port.c b/portable/RVDS/ARM_CM4_MPU/port.c
index 87f5b56..c83251b 100644
--- a/portable/RVDS/ARM_CM4_MPU/port.c
+++ b/portable/RVDS/ARM_CM4_MPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM4_MPU/portmacro.h b/portable/RVDS/ARM_CM4_MPU/portmacro.h
index 1570aa3..7d9a403 100644
--- a/portable/RVDS/ARM_CM4_MPU/portmacro.h
+++ b/portable/RVDS/ARM_CM4_MPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM7/r0p1/port.c b/portable/RVDS/ARM_CM7/r0p1/port.c
index bc21d2f..c508a00 100644
--- a/portable/RVDS/ARM_CM7/r0p1/port.c
+++ b/portable/RVDS/ARM_CM7/r0p1/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/RVDS/ARM_CM7/r0p1/portmacro.h b/portable/RVDS/ARM_CM7/r0p1/portmacro.h
index 584e2fb..e7ff957 100644
--- a/portable/RVDS/ARM_CM7/r0p1/portmacro.h
+++ b/portable/RVDS/ARM_CM7/r0p1/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX100/port.c b/portable/Renesas/RX100/port.c
index bc30af0..4e4ef25 100644
--- a/portable/Renesas/RX100/port.c
+++ b/portable/Renesas/RX100/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX100/port_asm.src b/portable/Renesas/RX100/port_asm.src
index 0a2b588..c764635 100644
--- a/portable/Renesas/RX100/port_asm.src
+++ b/portable/Renesas/RX100/port_asm.src
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX100/portmacro.h b/portable/Renesas/RX100/portmacro.h
index fcc6f74..cffd60f 100644
--- a/portable/Renesas/RX100/portmacro.h
+++ b/portable/Renesas/RX100/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX200/port.c b/portable/Renesas/RX200/port.c
index f8bd8b8..3fe9cde 100644
--- a/portable/Renesas/RX200/port.c
+++ b/portable/Renesas/RX200/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX200/port_asm.src b/portable/Renesas/RX200/port_asm.src
index 0a2b588..c764635 100644
--- a/portable/Renesas/RX200/port_asm.src
+++ b/portable/Renesas/RX200/port_asm.src
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX200/portmacro.h b/portable/Renesas/RX200/portmacro.h
index 69a446b..895692a 100644
--- a/portable/Renesas/RX200/portmacro.h
+++ b/portable/Renesas/RX200/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX600/port.c b/portable/Renesas/RX600/port.c
index cea88cb..d522dbb 100644
--- a/portable/Renesas/RX600/port.c
+++ b/portable/Renesas/RX600/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX600/port_asm.src b/portable/Renesas/RX600/port_asm.src
index 0a2b588..c764635 100644
--- a/portable/Renesas/RX600/port_asm.src
+++ b/portable/Renesas/RX600/port_asm.src
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX600/portmacro.h b/portable/Renesas/RX600/portmacro.h
index b4b2430..3df5e2c 100644
--- a/portable/Renesas/RX600/portmacro.h
+++ b/portable/Renesas/RX600/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX600v2/port.c b/portable/Renesas/RX600v2/port.c
index 0924ff8..507a475 100644
--- a/portable/Renesas/RX600v2/port.c
+++ b/portable/Renesas/RX600v2/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX600v2/port_asm.src b/portable/Renesas/RX600v2/port_asm.src
index c40cb6e..2ab3cf1 100644
--- a/portable/Renesas/RX600v2/port_asm.src
+++ b/portable/Renesas/RX600v2/port_asm.src
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX600v2/portmacro.h b/portable/Renesas/RX600v2/portmacro.h
index 269985d..53897c6 100644
--- a/portable/Renesas/RX600v2/portmacro.h
+++ b/portable/Renesas/RX600v2/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX700v3_DPFPU/port.c b/portable/Renesas/RX700v3_DPFPU/port.c
index a797928..26cb9f0 100644
--- a/portable/Renesas/RX700v3_DPFPU/port.c
+++ b/portable/Renesas/RX700v3_DPFPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX700v3_DPFPU/port_asm.src b/portable/Renesas/RX700v3_DPFPU/port_asm.src
index 3cdfd79..82d8913 100644
--- a/portable/Renesas/RX700v3_DPFPU/port_asm.src
+++ b/portable/Renesas/RX700v3_DPFPU/port_asm.src
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/RX700v3_DPFPU/portmacro.h b/portable/Renesas/RX700v3_DPFPU/portmacro.h
index fb443d6..b90b7d9 100644
--- a/portable/Renesas/RX700v3_DPFPU/portmacro.h
+++ b/portable/Renesas/RX700v3_DPFPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/SH2A_FPU/ISR_Support.inc b/portable/Renesas/SH2A_FPU/ISR_Support.inc
index 620244c..532d5c4 100644
--- a/portable/Renesas/SH2A_FPU/ISR_Support.inc
+++ b/portable/Renesas/SH2A_FPU/ISR_Support.inc
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/SH2A_FPU/port.c b/portable/Renesas/SH2A_FPU/port.c
index 5752bc6..410be74 100644
--- a/portable/Renesas/SH2A_FPU/port.c
+++ b/portable/Renesas/SH2A_FPU/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/SH2A_FPU/portasm.src b/portable/Renesas/SH2A_FPU/portasm.src
index c69e864..fb98e0a 100644
--- a/portable/Renesas/SH2A_FPU/portasm.src
+++ b/portable/Renesas/SH2A_FPU/portasm.src
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Renesas/SH2A_FPU/portmacro.h b/portable/Renesas/SH2A_FPU/portmacro.h
index 2acf75c..0085dcd 100644
--- a/portable/Renesas/SH2A_FPU/portmacro.h
+++ b/portable/Renesas/SH2A_FPU/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Rowley/MSP430F449/port.c b/portable/Rowley/MSP430F449/port.c
index 7c17670..9d3d909 100644
--- a/portable/Rowley/MSP430F449/port.c
+++ b/portable/Rowley/MSP430F449/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Rowley/MSP430F449/portasm.h b/portable/Rowley/MSP430F449/portasm.h
index 056e4ee..cf58272 100644
--- a/portable/Rowley/MSP430F449/portasm.h
+++ b/portable/Rowley/MSP430F449/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Rowley/MSP430F449/portext.asm b/portable/Rowley/MSP430F449/portext.asm
index e0fac1a..f8d732a 100644
--- a/portable/Rowley/MSP430F449/portext.asm
+++ b/portable/Rowley/MSP430F449/portext.asm
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Rowley/MSP430F449/portmacro.h b/portable/Rowley/MSP430F449/portmacro.h
index e649aff..0169ce7 100644
--- a/portable/Rowley/MSP430F449/portmacro.h
+++ b/portable/Rowley/MSP430F449/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/SDCC/Cygnal/port.c b/portable/SDCC/Cygnal/port.c
index 44de7db..63a556e 100644
--- a/portable/SDCC/Cygnal/port.c
+++ b/portable/SDCC/Cygnal/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/SDCC/Cygnal/portmacro.h b/portable/SDCC/Cygnal/portmacro.h
index 1bd6547..f475168 100644
--- a/portable/SDCC/Cygnal/portmacro.h
+++ b/portable/SDCC/Cygnal/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Softune/MB91460/__STD_LIB_sbrk.c b/portable/Softune/MB91460/__STD_LIB_sbrk.c
index c29f8d9..fdd795f 100644
--- a/portable/Softune/MB91460/__STD_LIB_sbrk.c
+++ b/portable/Softune/MB91460/__STD_LIB_sbrk.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Softune/MB91460/port.c b/portable/Softune/MB91460/port.c
index 9d7902e..c1a37a4 100644
--- a/portable/Softune/MB91460/port.c
+++ b/portable/Softune/MB91460/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Softune/MB91460/portmacro.h b/portable/Softune/MB91460/portmacro.h
index 5ec1ffa..05e3512 100644
--- a/portable/Softune/MB91460/portmacro.h
+++ b/portable/Softune/MB91460/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Softune/MB96340/__STD_LIB_sbrk.c b/portable/Softune/MB96340/__STD_LIB_sbrk.c
index c29f8d9..fdd795f 100644
--- a/portable/Softune/MB96340/__STD_LIB_sbrk.c
+++ b/portable/Softune/MB96340/__STD_LIB_sbrk.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Softune/MB96340/port.c b/portable/Softune/MB96340/port.c
index d323dea..25f0524 100644
--- a/portable/Softune/MB96340/port.c
+++ b/portable/Softune/MB96340/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Softune/MB96340/portmacro.h b/portable/Softune/MB96340/portmacro.h
index 5efc95e..8b080f2 100644
--- a/portable/Softune/MB96340/portmacro.h
+++ b/portable/Softune/MB96340/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Tasking/ARM_CM4F/port.c b/portable/Tasking/ARM_CM4F/port.c
index 9ff3ac8..2a1d34e 100644
--- a/portable/Tasking/ARM_CM4F/port.c
+++ b/portable/Tasking/ARM_CM4F/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/Tasking/ARM_CM4F/port_asm.asm b/portable/Tasking/ARM_CM4F/port_asm.asm
index 65678d3..af3b877 100644
--- a/portable/Tasking/ARM_CM4F/port_asm.asm
+++ b/portable/Tasking/ARM_CM4F/port_asm.asm
@@ -2,6 +2,8 @@
 ; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 ; *
+; * SPDX-License-Identifier: MIT
+; *
 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
 ; * this software and associated documentation files (the "Software"), to deal in
 ; * the Software without restriction, including without limitation the rights to
diff --git a/portable/Tasking/ARM_CM4F/portmacro.h b/portable/Tasking/ARM_CM4F/portmacro.h
index abe0f48..c4b6341 100644
--- a/portable/Tasking/ARM_CM4F/portmacro.h
+++ b/portable/Tasking/ARM_CM4F/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/CDK/T-HEAD_CK802/port.c b/portable/ThirdParty/CDK/T-HEAD_CK802/port.c
index 9d69030..964ddd9 100644
--- a/portable/ThirdParty/CDK/T-HEAD_CK802/port.c
+++ b/portable/ThirdParty/CDK/T-HEAD_CK802/port.c
@@ -1,6 +1,8 @@
 /*
  * Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/CDK/T-HEAD_CK802/portasm.S b/portable/ThirdParty/CDK/T-HEAD_CK802/portasm.S
index a5d6379..7396b50 100644
--- a/portable/ThirdParty/CDK/T-HEAD_CK802/portasm.S
+++ b/portable/ThirdParty/CDK/T-HEAD_CK802/portasm.S
@@ -1,6 +1,8 @@
 /*
  * Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/CDK/T-HEAD_CK802/portmacro.h b/portable/ThirdParty/CDK/T-HEAD_CK802/portmacro.h
index b29e5a7..61b652e 100644
--- a/portable/ThirdParty/CDK/T-HEAD_CK802/portmacro.h
+++ b/portable/ThirdParty/CDK/T-HEAD_CK802/portmacro.h
@@ -1,6 +1,8 @@
 /*
  * Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.c b/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.c
index a3fc681..3b5b085 100644
--- a/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.c
+++ b/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.h b/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.h
index 93e001c..35a5aba 100644
--- a/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.h
+++ b/portable/ThirdParty/GCC/ARC_EM_HS/arc_freertos_exceptions.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_EM_HS/arc_support.s b/portable/ThirdParty/GCC/ARC_EM_HS/arc_support.s
index b630c36..0a392c1 100644
--- a/portable/ThirdParty/GCC/ARC_EM_HS/arc_support.s
+++ b/portable/ThirdParty/GCC/ARC_EM_HS/arc_support.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_EM_HS/freertos_tls.c b/portable/ThirdParty/GCC/ARC_EM_HS/freertos_tls.c
index 00d1b66..7d74f31 100644
--- a/portable/ThirdParty/GCC/ARC_EM_HS/freertos_tls.c
+++ b/portable/ThirdParty/GCC/ARC_EM_HS/freertos_tls.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_EM_HS/port.c b/portable/ThirdParty/GCC/ARC_EM_HS/port.c
index e623573..57be56a 100644
--- a/portable/ThirdParty/GCC/ARC_EM_HS/port.c
+++ b/portable/ThirdParty/GCC/ARC_EM_HS/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_EM_HS/portmacro.h b/portable/ThirdParty/GCC/ARC_EM_HS/portmacro.h
index 4735176..49245bd 100644
--- a/portable/ThirdParty/GCC/ARC_EM_HS/portmacro.h
+++ b/portable/ThirdParty/GCC/ARC_EM_HS/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.c b/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.c
index a3fc681..3b5b085 100644
--- a/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.c
+++ b/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.h b/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.h
index 93e001c..35a5aba 100644
--- a/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.h
+++ b/portable/ThirdParty/GCC/ARC_v1/arc_freertos_exceptions.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_v1/arc_support.s b/portable/ThirdParty/GCC/ARC_v1/arc_support.s
index a028dc1..1a4bcba 100644
--- a/portable/ThirdParty/GCC/ARC_v1/arc_support.s
+++ b/portable/ThirdParty/GCC/ARC_v1/arc_support.s
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_v1/port.c b/portable/ThirdParty/GCC/ARC_v1/port.c
index 6b44292..d3de6fa 100644
--- a/portable/ThirdParty/GCC/ARC_v1/port.c
+++ b/portable/ThirdParty/GCC/ARC_v1/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARC_v1/portmacro.h b/portable/ThirdParty/GCC/ARC_v1/portmacro.h
index ed7930d..5034b11 100644
--- a/portable/ThirdParty/GCC/ARC_v1/portmacro.h
+++ b/portable/ThirdParty/GCC/ARC_v1/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Synopsys, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ARM_CM33_TFM/os_wrapper_freertos.c b/portable/ThirdParty/GCC/ARM_CM33_TFM/os_wrapper_freertos.c
index 5e9145b..01183fb 100644
--- a/portable/ThirdParty/GCC/ARM_CM33_TFM/os_wrapper_freertos.c
+++ b/portable/ThirdParty/GCC/ARM_CM33_TFM/os_wrapper_freertos.c
@@ -1,6 +1,8 @@
 /*
  * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ATmega/port.c b/portable/ThirdParty/GCC/ATmega/port.c
index a805915..8277949 100644
--- a/portable/ThirdParty/GCC/ATmega/port.c
+++ b/portable/ThirdParty/GCC/ATmega/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/ATmega/portmacro.h b/portable/ThirdParty/GCC/ATmega/portmacro.h
index 404ee5e..40e59ff 100644
--- a/portable/ThirdParty/GCC/ATmega/portmacro.h
+++ b/portable/ThirdParty/GCC/ATmega/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/Posix/port.c b/portable/ThirdParty/GCC/Posix/port.c
index ee277a5..e80f751 100644
--- a/portable/ThirdParty/GCC/Posix/port.c
+++ b/portable/ThirdParty/GCC/Posix/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2020 Cambridge Consultants Ltd.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/GCC/Posix/portmacro.h b/portable/ThirdParty/GCC/Posix/portmacro.h
index 19f0716..215b920 100644
--- a/portable/ThirdParty/GCC/Posix/portmacro.h
+++ b/portable/ThirdParty/GCC/Posix/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright 2020 Cambridge Consultants Ltd.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/XCC/Xtensa/port.c b/portable/ThirdParty/XCC/Xtensa/port.c
index af1370c..f1212a8 100644
--- a/portable/ThirdParty/XCC/Xtensa/port.c
+++ b/portable/ThirdParty/XCC/Xtensa/port.c
@@ -3,6 +3,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/ThirdParty/XCC/Xtensa/portmacro.h b/portable/ThirdParty/XCC/Xtensa/portmacro.h
index d8353bb..00f1140 100644
--- a/portable/ThirdParty/XCC/Xtensa/portmacro.h
+++ b/portable/ThirdParty/XCC/Xtensa/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/WizC/PIC18/Drivers/Tick/Tick.c b/portable/WizC/PIC18/Drivers/Tick/Tick.c
index 4041d6e..8182433 100644
--- a/portable/WizC/PIC18/Drivers/Tick/Tick.c
+++ b/portable/WizC/PIC18/Drivers/Tick/Tick.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/WizC/PIC18/Drivers/Tick/isrTick.c b/portable/WizC/PIC18/Drivers/Tick/isrTick.c
index 6448c8c..853c68b 100644
--- a/portable/WizC/PIC18/Drivers/Tick/isrTick.c
+++ b/portable/WizC/PIC18/Drivers/Tick/isrTick.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/WizC/PIC18/addFreeRTOS.h b/portable/WizC/PIC18/addFreeRTOS.h
index f417ce6..8082326 100644
--- a/portable/WizC/PIC18/addFreeRTOS.h
+++ b/portable/WizC/PIC18/addFreeRTOS.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/WizC/PIC18/port.c b/portable/WizC/PIC18/port.c
index ab4366b..406179c 100644
--- a/portable/WizC/PIC18/port.c
+++ b/portable/WizC/PIC18/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/WizC/PIC18/portmacro.h b/portable/WizC/PIC18/portmacro.h
index 7afbe96..ae80e33 100644
--- a/portable/WizC/PIC18/portmacro.h
+++ b/portable/WizC/PIC18/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/oWatcom/16BitDOS/Flsh186/port.c b/portable/oWatcom/16BitDOS/Flsh186/port.c
index 9d3ae4a..8fcb530 100644
--- a/portable/oWatcom/16BitDOS/Flsh186/port.c
+++ b/portable/oWatcom/16BitDOS/Flsh186/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/oWatcom/16BitDOS/Flsh186/portmacro.h b/portable/oWatcom/16BitDOS/Flsh186/portmacro.h
index e89e894..21c8df8 100644
--- a/portable/oWatcom/16BitDOS/Flsh186/portmacro.h
+++ b/portable/oWatcom/16BitDOS/Flsh186/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/oWatcom/16BitDOS/PC/port.c b/portable/oWatcom/16BitDOS/PC/port.c
index 6885dac..33b6acf 100644
--- a/portable/oWatcom/16BitDOS/PC/port.c
+++ b/portable/oWatcom/16BitDOS/PC/port.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/oWatcom/16BitDOS/PC/portmacro.h b/portable/oWatcom/16BitDOS/PC/portmacro.h
index 3cdf11a..6ece853 100644
--- a/portable/oWatcom/16BitDOS/PC/portmacro.h
+++ b/portable/oWatcom/16BitDOS/PC/portmacro.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/oWatcom/16BitDOS/common/portasm.h b/portable/oWatcom/16BitDOS/common/portasm.h
index 094ccf4..7fe5b8c 100644
--- a/portable/oWatcom/16BitDOS/common/portasm.h
+++ b/portable/oWatcom/16BitDOS/common/portasm.h
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/portable/oWatcom/16BitDOS/common/portcomn.c b/portable/oWatcom/16BitDOS/common/portcomn.c
index 3a07d04..69ba043 100644
--- a/portable/oWatcom/16BitDOS/common/portcomn.c
+++ b/portable/oWatcom/16BitDOS/common/portcomn.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/queue.c b/queue.c
index 80be79c..807dbd7 100644
--- a/queue.c
+++ b/queue.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/stream_buffer.c b/stream_buffer.c
index d04cb82..ab9e1cf 100644
--- a/stream_buffer.c
+++ b/stream_buffer.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/tasks.c b/tasks.c
index a6809b5..f35f080 100644
--- a/tasks.c
+++ b/tasks.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
diff --git a/timers.c b/timers.c
index 6c7d12d..168b0c8 100644
--- a/timers.c
+++ b/timers.c
@@ -2,6 +2,8 @@
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to