Question: Under what condition may a network omit or postpone authentication and ciphering for an enhanced Multi-Level Precedence and Pre-emption Service (eMLPP) call?
Option 1: To provide faster call setup based on the priority level of the call and network-specific service configuration stored in the Mobile Switching Center (MSC).
Option 2: When the called subscriber is in idle mode, requiring immediate paging.
Option 3: If the Mobile Station is operating in group receive mode without a SIM-based service configuration list.
Option 4: For all eMLPP calls to ensure uniform security protocols across the network.
Explanation: This option correctly identifies the condition under which a network may choose to omit or postpone authentication and ciphering for an eMLPP call, emphasizing the balance between security measures and the need for expedited call setup based on priority levels and specific network configurations.