Question: In a Lawful Interception (LI) scenario for IMS Conference Services, where a target joins an associate's conference, what is the current status of handling this case according to 3GPP specifications?
Option 1: This case is explicitly excluded from interception due to privacy concerns.
Option 2: It is mandatorily covered under all circumstances as part of standard LI procedures.
Option 3: This specific scenario is currently marked for further study and not yet fully addressed.
Option 4: It is only applicable if the associate's conference is identified by a Conference URI or Conference Factory URI.
Explanation: The correct answer, Option 3, reflects that the scenario where "an target joins an associate's conference" is not fully addressed in the current specifications and is indicated as being "for further study". This shows that while there are clear guidelines for certain aspects of IMS Conference Services interception (e.g., when the target heads a conference or a conference itself is targeted), this particular nuance requires additional examination and is not yet standardized.