Question: In a Policy and Charging Control (PCC) scenario, when a Charging-Rule-Remove AVP is sent to the PCEF without including the Resource-Release-Notification AVP, what action is taken by the PCEF regarding resource release notification?
Option 1: The PCEF notifies the resource release for all rules within the session.
Option 2: The PCEF does not notify the resource release for any of the removed rules.
Option 3: The PCEF conditionally notifies the resource release based on predefined PCC rule groups.
Option 4: The PCEF sends a separate request to the PCRF for further instructions on resource release.
Explanation: According to the specifications, if a Charging-Rule-Remove AVP does not include the Resource-Release-Notification AVP, the resource release shall not be notified by the PCEF. This implies that without this specific AVP, the PCEF will not take any action to notify about the resource release for the rules being removed or deactivated.