3GPP 24.501 v20.0.0 — the document's own text
6.4.3.1 General
Taught in 6. Getting on the network, and getting a connection through it (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).
The purpose of the UE-requested PDU session release procedure is to enable by the UE to request a release of a PDU session.
The UE is allowed to initiate the PDU session release procedure even if the timer T3396 is running.
The UE is allowed to initiate the PDU session release procedure even if the timer T3584 is running.
The UE is allowed to initiate the PDU session release procedure even if the timer T3585 is running.
The UE is allowed to initiate the PDU session release procedure even if the UE is outside the LADN service area.