Question: What determines the destination NF type to be notified in the Namf_Communication_N1MessageNotify service operation?
Option 1: The N1 message type is always known to be consumed by one particular NF type, or an NF had explicitly subscribed for the particular N1 message type.
Option 2: The AMF ID (GUAMI) and local time zone of the UE.
Option 3: The AN access information (e.g. AN type, AN N2 terminating point, CAG Identifier(s) of the CAG cell).
Option 4: The SUPI, MM Context, and Allowed NSSAI parameters.
Explanation: According to the Namf_Communication_N1MessageNotify service operation description, the destination NF type to be notified is determined based on either the N1 message type being always known to be consumed by one particular NF type or an NF having explicitly subscribed for the particular N1 message type. This ensures that the notification is sent to the correct NF instance that can process the received N1 message from the UE.