Section: 4.15.3.2.3c Specific NEF service operations information flow for group member list change
Content: The procedure is used by the AF to subscribe to notifications and to explicitly cancel a previous subscription for group member list change. Step 1, step 2, step 4, step 5, step 6a and step 7 of Figure 4.15.3.2.3-1 are performed with the differences that the Event ID is set with "Group Member List Change". When a NF consumer subscribes to the group member list change event, if the request indicates immediate reporting, the group member list is provided in the Nudm/Nnef_EeventEExposure_Subscribe response, When the UDM detects the group member list change event occurs, it sends the event report including the identities of the UE(s) added/removed to/from the group to the NEF by means of Nudm_EventExposure_Notify message and NEF forwards the information to the AF by means of Nnef_EventExposure_Notify message.