Question: Under what conditions will the network include the T3447 value Information Element (IE) in a message?
Option 1: When the UE has indicated support for service gap control in the REGISTRATION ACCEPT message.
Option 2: When the 5GMM context contains a service gap time value, but the UE has not indicated support for service gap control.
Option 3: When the UE has indicated support for service gap control in the REGISTRATION REQUEST message and the 5GMM context contains a service gap time value.
Option 4: When the network initiates a service gap control procedure.
Explanation: The correct answer is Option 3 because, according to the specification, the network will include the T3447 value IE only if two conditions are met: (1) the UE has indicated support for service gap control in the REGISTRATION REQUEST message, and (2) the 5GMM context contains a service gap time value. This ensures that the UE is capable of handling service gap control and that there is relevant information to be conveyed.