3GPP 24.501 v20.0.0 — the document's own text

D.2.2.3 UE-initiated UE state indication procedure accepted by the network

Taught in 5. Finding your way around TS 24.501 (CT1 — the group that writes what your phone says, in depth), 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).

Upon receipt of the UE STATE INDICATION message, the PCF shall operate as described in 3GPP TS 23.502 [9] and 3GPP TS 29.525 [21].