In part to facilitate interoperability, the FedNow Service design will use the widely accepted ISO 20022 message standard and other industry best practices.
10 To the extent other instant payment services fully adopt the same publicly available, widely accepted standards, this approach would enable a form of interoperability where banks can route payments through either the FedNow Service or other instant payment services based on the available path to the receiver. This is similar to the prevailing approach in payment card transactions, for instance.