Section: 4.6.3.6 Session management for partial network slice
Content: If the S-NSSAI is included in the partially allowed NSSAI and: a) if the current TAI is in the list of TAs for which the S-NSSAI is allowed, the UE can initiate the UE-requested PDU session establishment procedure for the S-NSSAI; or b) if the current TAI is not in the list of TAs for which the S-NSSAI is allowed, the UE shall not initiate the UE-requested PDU session establishment procedure for the S-NSSAI. If an existing PDU session is established for the S-NSSAI included in the partially allowed NSSAI and: a) if the current TAI is changed and the current TAI is in the list of TAs for which the S-NSSAI is allowed, the UE can initiate the service request procedure to re-establish the user plane resources for the established PDU session or the UE can initiate UL NAS TRANSPORT messages carrying control plane user data or the SMF can send control plane user data to the UE; or b) if the current TAI is changed and the current TAI is not in the list of TAs for which the S-NSSAI is allowed, the SMF and the UE shall maintain the 5GSM contexts for the established PDU session. The UE shall not initiate UL NAS TRANSPORT messages carrying control plane user data and the SMF shall not send control plane user data to the UE. The session management for partial network slice is not applicable to the PDU session established for onboarding services in SNPN.