Section: 4.8.2 Single-registration mode 4.8.2.1 General
Content: If the UE receives the indication that "interworking without N26 interface not supported" (see 3GPP TS 24.301[ Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 ]  [15]), the UE operates as described in subclause 4.8.2.2. If the UE receives the indication that "interworking without N26 interface supported" and a) the UE does not support dual-registration mode; or b) the UE supporting dual-registration mode determines to operate in single-registration mode, the UE operates as described in subclause 4.8.2.3.