Section: I.8.1 Credentials holder using AUSF and UDM for primary authentication
Content: For SNPNs with Credentials Holder using AUSF and UDM for primary authentication, clause 5.30.2.9.3 of TS 23.501[ System architecture for the 5G System (5GS) ]  [2] states that the UE is not considered to be roaming, however SNPN and Credentials Holder communicate via SEPPs. The following requirements and procedures related to SEPPs and interconnect security apply for SNPNs with Credentials Holder using AUSF and UDM for primary authentication: - Requirements for Security Edge Protection Proxy (SEPP), clause 5.9.3.2 - Protection between SEPPs, clause 13.1.2. NOTE: IPX providers are not expected to be used between SNPN and Credentials holder using AUSF and UDM for primary authentication.