The present document specifies the stage 3 protocol and data model for the Access and Mobility Policy Authorization service (Npcf_AMPolicyAuthorization) of the 5G System. The 5G System stage 2 architecture of the Access and Mobility Policy Authorization service are contained in TS 23.502 and TS 23.503. The 5G System Architecture is defined in TS 23.501. Stage 3 call flows for policy and charging control use cases are provided in TS 29.513. The Technical Realization of the Service Based Architecture and the Principles and Guidelines for Services Definition are specified in TS 29.500 and TS 29.501. The Access and Mobility Policy Authorization service is provided by the Policy Control Function (PCF). This service creates access and mobility policies (e.g. service area restrictions, or access stratum time distribution information) as requested by an authorized NF service consumer (e.g. AF, NEF, or TSCTSF) for the Access and Mobility Policy Context to which the related NF service consumer's context (e.g. AF, NEF, or TSCTSF) is bound. This service also enables subscription/notifications on UE 5G ProSe Policy event(s) related to the UE context to which the NF service consumer's context (e.g. 5G DDNMF) is bound.

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