Section: 6.18.2 Requirements
Content: The 5G system shall enable users to obtain services from more than one network simultaneously on an on-demand basis. For a user with a single operator subscription, the use of multiple serving networks operated by different operators shall be under the control of the home operator. When a service is offered by multiple operators, the 5G system shall be able to maintain service continuity with minimum service interruption when the serving network is changed to a different serving network operated by a different operator. NOTE 1: A business agreement is required between the network operators. In the event of the same service being offered by multiple operators, unless directed by the home operator's network, the UE shall be prioritized to receive subscribed services from the home operator's network. NOTE 2: If the service is unavailable (e.g. due to lack of network coverage) from the home operator's network, the UE may be able to receive the service from another operator's network. NOTE 3: QoS provided by the partner operator's network for the same service will be based on the agreement between the two operators and could be different than that provided by the home operator's network.