Question: In a PCC context, when a PCEF requests PCC Rules for Emergency services at IP-CAN Session Establishment, what is the required setting for the CC-Request-Type AVP in the CCR command?
Option 1: UPDATE_REQUEST
Option 2: INITIAL_REQUEST
Option 3: TERMINATION_REQUEST
Option 4: EVENT_TRIGGER
Explanation: When initiating a new session, such as requesting PCC Rules for Emergency services at IP-CAN Session Establishment, the PCEF must indicate to the PCRF that this is a new request. Setting the CC-Request-Type AVP to 'INITIAL_REQUEST' signifies the start of a new session or the initial request for rules, crucial for emergency services to ensure immediate and proper handling.