Question: Under what condition is the Forbidden TAI(s) Information Element (IE) included in a message?
Option 1: When the UE is in idle mode.
Option 2: When the network is congested.
Option 3: When the message is sent via satellite E-UTRAN access.
Option 4: When the UE is performing a handover.
Explanation: The Forbidden TAI(s) IE is specifically included in messages sent via satellite E-UTRAN access to indicate forbidden tracking areas for roaming, ensuring that the UE avoids certain areas while roaming.