Question: When should the PDU Session Reactivation Result Information Element (IE) be included in a REGISTRATION REQUEST message?
Option 1: Only if the Uplink data status IE is included in the REGISTRATION REQUEST message.
Option 2: Only if the Allowed PDU session status IE is included in the REGISTRATION REQUEST message and there is at least one PDU session indicated for which the user-plane resources can be re-established over non-3GPP access.
Option 3: If either the Uplink data status IE or the Allowed PDU session status IE is included in the REGISTRATION REQUEST message, regardless of the access type.
Option 4: If neither the Uplink data status IE nor the Allowed PDU session status IE is included in the REGISTRATION REQUEST message.
Explanation: The correct answer is Option 1 because the PDU Session Reactivation Result IE should be included if the Uplink data status IE is included in the REGISTRATION REQUEST message, or if the Allowed PDU session status IE is included and there is at least one PDU session indicated for which the user-plane resources can be re-established over 3GPP access.