diff --git a/keymaster/4.0/vts/functional/KeymasterHidlTest.cpp b/keymaster/4.0/vts/functional/KeymasterHidlTest.cpp
index d326334510..d0ad433464 100644
--- a/keymaster/4.0/vts/functional/KeymasterHidlTest.cpp
+++ b/keymaster/4.0/vts/functional/KeymasterHidlTest.cpp
@@ -21,7 +21,6 @@
 
 #include <android-base/logging.h>
 #include <android/hidl/manager/1.0/IServiceManager.h>
-#include <cutils/properties.h>
 
 #include <keymasterV4_0/key_param_output.h>
 #include <keymasterV4_0/keymaster_utils.h>
@@ -686,9 +685,6 @@ std::vector<uint32_t> KeymasterHidlTest::InvalidKeySizes(Algorithm algorithm) {
             case Algorithm::EC:
                 return {224, 384, 521};
             case Algorithm::AES:
-                // The HAL language was clarified to exclude AES key sizes of 192 for StrongBox
-                // instances on devices launched on API Level 31 and above.
-                if (property_get_int32("ro.board.first_api_level", 0) < 31) return {};
                 return {192};
             default:
                 return {};
diff --git a/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl b/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl
index cd8cfc5f6e..18497236eb 100644
--- a/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl
+++ b/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl
@@ -96,8 +96,7 @@ import android.hardware.security.secureclock.TimeStampToken;
  *
  * o   AES
  *
- *      - TRUSTED_ENVIRONMENT IKeyMintDevices must support 128, 192 and 256-bit keys.
- *        STRONGBOX IKeyMintDevices must only support 128 and 256-bit keys.
+ *      - 128 and 256-bit keys
  *      - CBC, CTR, ECB and GCM modes.  The GCM mode must not allow the use of tags smaller than 96
  *        bits or nonce lengths other than 96 bits.
  *      - CBC and ECB modes must support unpadded and PKCS7 padding modes.  With no padding CBC and