3GPP 24.501 v20.0.0 — the document's own text
8.2.19.37 Extended LADN information
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
This IE may be included to assign new extended LADN information to the UE or delete the extended LADN information at the UE side.