Question: In a Public Land Mobile Network (PLMN) that supports the Calling Line Identity Presentation (CLIP) service but does not support the Calling Line Identity Restriction (CLIR) service, what is ensured regarding the display of a subscriber's line identity to the called party?
Option 1: The line identity is always displayed to the called party.
Option 2: The line identity is never displayed to the called party.
Option 3: The line identity is displayed only if the called party has CLIR override capability.
Option 4: The display of the line identity depends on the subscriber's default settings.
Explanation: According to supplementary service principles, a PLMN supporting CLIP but not CLIR ensures a subscriber's line identity is not disclosed unless the called party has CLIR override capability, balancing privacy with identifiable information needs.