Section: 4.4.3.2 N4 Association Update Procedure
Content: The N4 Association Update procedure shall be used to modify an existing N4 association between the SMF and the UPF. It may be initiated by the UPF or by the SMF to update the supported features or available resources of the UP function. N4 Association Update procedure can be used by the SMF to update the provisioning of External Clock Drift Report as specified in clause 4.4.3.1. Figure 4.4.3.2-1: SMF initiated N4 association update procedure Figure 4.4.3.2-2: UPF initiated N4 association update procedure