3GPP 24.501 v20.0.0 — the document's own text
8.3.2.19 Service-level-AA container
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
The SMF shall include the Service-level-AA container IE if the service-level authentication and authorization procedure is completed successfully by the external DN.