Adherence: Each participating IPS will operate under its own (domestic) scheme, which defines the rules applying to domestic instant payments. An IPS can become “Nexus enabled” by meeting the Scheme compliance criteria, such as implementing and testing the Nexus Gateway and by adhering to the Nexus Scheme. The IPS can then offer its members the ability to process Nexus Payments. As a first step, it will manage the on-boarding and adherence process of its members through eg an addendum to the local scheme rules. On completion, participants can start receiving and sending Nexus Payments.