Section: 5.3.13A Forbidden PLMN lists
Content: In N1 mode, two lists of forbidden PLMN are managed independently per access type, i.e., 3GPP access or non-3GPP access: - the list of "forbidden PLMNs" as defined in 3GPP TS 23.122[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [5] is applicable for 3GPP access in N1 mode. The same list is used by 5GMM for 3GPP access, EMM, GMM and MM (see 3GPP TS 24.301[ Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 ]  [15] and 3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  [12]), regardless whether the UE is operating in single-registration mode or dual-registration mode. - the list of "forbidden PLMNs for non-3GPP access to 5GCN" as defined in 3GPP TS 24.502[ Access to the 3GPP 5G Core Network (5GCN) via non-3GPP access networks ]  [18] is applicable for 5GMM for non-3GPP access. The list of "forbidden PLMNs for GPRS service" as defined in 3GPP TS 23.122[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [5] and 3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  [12] is applicable for 3GPP access in N1 mode. The same list is used by 5GMM for 3GPP access, EMM and GMM (see 3GPP TS 24.301[ Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 ]  [15] and 3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  [12]), regardless whether the UE is operating in single-registration mode or dual-registration mode. The forbidden PLMN lists shall be maintained across activation and deactivation of SNPN access operation mode. NOTE: On timer T3245 expiry when the UE supports access to an SNPN using credentials from a credentials holder using PLMN subscription, and the UE is operating in SNPN access operation mode, as an implementation option the UE can delete the list of "forbidden PLMNs", "forbidden PLMNs for non-3GPP access to 5GCN" and "forbidden PLMNs for GPRS service".