Section: 5.9.3.5 Requirements for Network Functions (NF)
Content: The NF that sends a signalling message (service/subscription request or notification message) shall include its PLMN-ID in the 3gpp-Sbi-Originating-Network-Id header. If an NF supports multiple PLMN-IDs, the sending NF shall include the PLMN ID in the 3gpp-Sbi-Originating-Network-Id header on behalf of which the message is sent. The handling of the PLMN-ID in the 3gpp-Sbi-Originating-Network-Id header at the receiving NF is up to configuration and deployment. NOTE: A misconfigured PLMN-ID in the 3gpp-Sbi-Originating-Network-Id header can lead to service interruption.