Question: For a UE subscribed to the 'Call/Session related Class' under 3GPP Location Services (LCS), what are the possible subscription options for positioning requests from identified value-added LCS clients or groups, specifically in terms of GMLC authorization?
Option 1: Only positioning requests from any GMLC are allowed, with no restrictions.
Option 2: Positioning is only allowed from a GMLC in the home country, or from GMLCs identified in the Secure User Plane Location (SLPP) for specific clients.
Option 3: Either positioning requests are allowed from any GMLC, or restricted to those in the home country, but not with specific SLPP identification.
Option 4: The subscription options include: location request allowed only from GMLCs identified in the SLPP; allowed only from a GMLC in the home country; or allowed from any GMLC (as the default case).
Explanation: This answer reflects the nuanced subscription options for Location Services (LCS) under the 'Call/Session related Class'. The correct answer accurately outlines three specified subscription options for handling positioning requests, emphasizing flexibility in authorizing GMLCs based on SLPP identification, home country location, or allowing any GMLC by default, highlighting customizable privacy and security settings in telecom networks for location-based services.