diff --git a/docs/firmware-design.rst b/docs/firmware-design.rst
index 7cc7485..051b92b 100644
--- a/docs/firmware-design.rst
+++ b/docs/firmware-design.rst
@@ -2532,6 +2532,12 @@
    translation table entries for a given stage of translation for a particular
    translation regime.
 
+Armv8.3-A
+~~~~~~~~~
+
+-  Pointer Authentication features of Armv8.3-A are unconditionally enabled so
+   that lower ELs are allowed to use them without causing a trap to EL3.
+
 Armv7-A
 ~~~~~~~