Question: In which scenario is the "Forbidden TAI(s)" Information Element (IE) included in a message?
Option 1: When the message is sent via terrestrial NG-RAN access.
Option 2: When the message is sent via satellite NG-RAN access and it's related to regional provision of service.
Option 3: When the UE is in idle mode and performs a periodic registration update.
Option 4: When the network initiates a connection for an emergency call.
Explanation: The "Forbidden TAI(s)" IE is specifically included when the message is sent via satellite NG-RAN access, as it relates to regional provision of service and the need to manage forbidden tracking areas in this context.