Question: Under what condition may a serving network allow a UE in a limited service state to access Restricted Local Operator Services (RLOS), and what is the implied security consequence?
Option 1: Always, without any conditions, and no additional security checks are required.
Option 2: Based on local regulation and operator policy, with the implication that the UE must perform further security checks due to the absence of network authentication like EPS AKA.
Option 3: Only after successful EPS AKA authentication, which ensures all necessary security checks have been completed.
Option 4: Never, as RLOS is not accessible in a limited service state under any circumstances.
Explanation: This option correctly identifies that access to RLOS for UEs in a limited service state is contingent upon local regulation and operator policy. It also accurately highlights the security implication of this access method: the lack of network authentication (e.g., EPS AKA) necessitates additional security checks by the UE to mitigate potential threats.