3GPP 24.501 v20.0.0 — the document's own text
5.2.3.2.7 UPDATE-NEEDED
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
The UE:
- shall not send any user data;
- shall not send signalling information, unless it is a service request as a response to paging or to initiate signalling for emergency services or emergency services fallback;
- shall perform cell selection/reselection;
- shall enter the appropriate new substate as soon as the lower layers indicate that the barring is alleviated for the access category with which the access attempt for the registration procedure for mobility and periodic registration update was associated and, if still needed, start the registration procedure for mobility and periodic registration update or the signalling for the de-registration procedure (see clauses 5.5.1.3.7, item l, and 5.5.2.2.6, item b); and
- if configured for eCall only mode as specified in 3GPP TS 31.102 [22], shall perform the eCall inactivity procedure at expiry of timer T3444 or T3445 (see clause 5.5.3).