The T2S User Requirements Document (URD) states that “The T2S Interface shall use ISO 20022 as its single standard for all communications, both inbound and outbound”. Therefore messages have to be either ISO20022 registered, or at least compliant with the methodology of ISO200221. SWIFT plays an important role in the registration process of ISO 20022standards and in the development of messages for T2S. Therefore, at its meeting of 9-10 October, the AG agreed that clarification was needed on the relationship between ISO 20022standards and SWIFT2.