diff --git a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
index 8fd1937..324f8cf 100644
--- a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -3640,11 +3640,21 @@
      * All integers between minInt32Value and maxInt32Value must be supported.
      *
      * The minInt32Value indicates the headrest is in its full recline position.
+     *
      * The maxInt32Value indicates the headrest is in its most upright/forward position.
      *
      * Values in between minInt32Value and maxInt32Value indicate a transition state between the
      * full recline and most upright/forward positions.
      *
+     * If {@code HasSupportedValueInfo} for a specific area ID is not {@code null}:
+     * {@code HasSupportedValueInfo.hasMinSupportedValue} and
+     * {@code HasSupportedValueInfo.hasMaxSupportedValue} must be {@code true} for the area ID.
+     * {@code MinMaxSupportedValueResult.minSupportedValue} has the same meaning as minInt32Value.
+     * {@code MinMaxSupportedValueResult.maxSupportedValue} has the same meaning as maxInt32Value.
+     * All integers between minSupportedValue and maxSupportedValue must be supported.
+     * At boot, minInt32Value is equal to minSupportedValue, maxInt32Value is equal to
+     * maxSupportedValue.
+     *
      * This property is not in any particular unit but in a specified range of relative positions.
      *
      * This property is defined as VehiclePropertyAccess.READ_WRITE, but OEMs have the option to
@@ -3653,6 +3663,7 @@
      * @change_mode VehiclePropertyChangeMode.ON_CHANGE
      * @access VehiclePropertyAccess.READ_WRITE
      * @access VehiclePropertyAccess.READ
+     * @require_min_max_supported_value
      * @version 2
      */
     SEAT_HEADREST_ANGLE_POS = 0x0B97 + 0x10000000 + 0x05000000
@@ -3663,16 +3674,26 @@
      * The maxInt32Value and minInt32Value in each VehicleAreaConfig must be defined. All integers
      * between minInt32Value and maxInt32Value must be supported.
      *
-     * The maxInt32Value represents the maximum movement speed of the seat's headrest while moving
-     * into an upright/forward position.
      * The minInt32Value represents the maximum movement speed of the seat's headrest while moving
      * into a shallow position.
      *
+     * The maxInt32Value represents the maximum movement speed of the seat's headrest while moving
+     * into an upright/forward position.
+     *
      * Larger absolute values, either positive or negative, indicate a faster movement speed. Once
      * the seat's headrest reaches the positional limit, the value must reset to 0. If
      * SEAT_HEADREST_ANGLE_MOVE's value is currently 0, then that means there is no movement
      * currently occurring.
      *
+     * If {@code HasSupportedValueInfo} for a specific area ID is not {@code null}:
+     * {@code HasSupportedValueInfo.hasMinSupportedValue} and
+     * {@code HasSupportedValueInfo.hasMaxSupportedValue} must be {@code true} for the area ID.
+     * {@code MinMaxSupportedValueResult.minSupportedValue} has the same meaning as minInt32Value.
+     * {@code MinMaxSupportedValueResult.maxSupportedValue} has the same meaning as maxInt32Value.
+     * All integers between minSupportedValue and maxSupportedValue must be supported.
+     * At boot, minInt32Value is equal to minSupportedValue, maxInt32Value is equal to
+     * maxSupportedValue.
+     *
      * This property is not in any particular unit but in a specified range of relative movement
      * speeds.
      *
@@ -3682,6 +3703,7 @@
      * @change_mode VehiclePropertyChangeMode.ON_CHANGE
      * @access VehiclePropertyAccess.READ_WRITE
      * @access VehiclePropertyAccess.READ
+     * @require_min_max_supported_value
      * @version 2
      */
     SEAT_HEADREST_ANGLE_MOVE = 0x0B98 + 0x10000000 + 0x05000000