Section: 8.3.1.10 IP header compression configuration
Content: The UE shall include the IP header compression configuration IE if: - the PDU session type value of the PDU session type IE is set to "IPv4", "IPv6" or "IPv4v6"; - the UE indicates "Control Plane CIoT 5GS optimization supported" and "IP header compression for control plane CIoT 5GS optimization supported" in the 5GMM capability IE of the REGISTRATION REQUEST message; and - the network indicates "Control plane CIoT 5GS optimization supported" and "IP header compression for control plane CIoT 5GS optimization supported" in the 5GS network support feature IE of the REGISTRATION ACCEPT message.