Section: 6.39.3 Service Exposure
Content: Requirements in this clause are subject to regulatory requirements and operator policy. The 5G system shall provide means to allow a trusted third-party to update the multimedia telephony service subscription and allocate a third-party specific identity to an authorized user. NOTE: The third party is authorized to change user identities for those subscriptions authorized by the operator. The following requirements apply to the originating side: - The 5G network shall provide a means for third parties (e.g. enterprises) to be authorized to verify the use of calling identity information by its authorized users. - The 5G network shall provide a means for authorized third parties to verify that an authenticated user is authorized to include or reference the pre-established calling identity information included in the call setup or retrieved by the called party. - The 5G network shall provide a means to verify the authenticity of the pre-established stored identity information that is referenced by the call setup and retrieved by the called party. The following requirements apply to the terminating side. - The 5G network shall provide a means for third parties (e.g. enterprises) to be able to verify the caller’s authorization to use the identity information either in addition to or instead of verification performed by the terminating PLMN. - The 5G network shall provide a means to verify the authenticity of any stored identity information referenced by the call setup to be presented to the called party.