This document introduces the Disclosure Framework and Assessment Methodology referenced in the April 2012 CPSS-IOSCO report "Principles for Financial Market Infrastructures" (PFMI). The Disclosure Framework prescribes standard disclosures expected of FMIs to provide transparency. The Assessment Methodology provides guidance for assessing observance of the 24 principles and 5 responsibilities for authorities set forth in the PFMI. Together these documents support consistent implementation of the PFMI and promote transparency, objectivity and comparability of FMI assessments.