The NSSAI is a collection of S-NSSAIs. An NSSAI may be a Configured NSSAI, a Requested NSSAI or an Allowed
NSSAI. There can be at most eight S-NSSAIs in Allowed and Requested NSSAIs sent in signalling messages between
the UE and the Network. The Requested NSSAI signalled by the UE to the network allows the network to select the
Serving AMF, Network Slice(s) and Network Slice instance(s) for this UE.