3GPP 24.501 v20.0.0 — the document's own text
8.2.7.49 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service"
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
This IE is included to indicate the forbidden TAI(s) to be stored in the list of "5GS forbidden tracking areas for regional provision of service". This IE is included only if the message is sent via satellite NG-RAN access.