The Uniform Standards of Professional Appraisal Practice (USPAP) are the generally accepted standards for professional appraisal practice in North America. USPAP contains standards for all types of appraisal services. Standards are included for real estate, personal property, business and mass appraisal. The Financial Institutions Reform, Recovery and Enforcement Act of 1989 recognizes USPAP as the generally accepted appraisal standards and requires USPAP compliance for appraisers in federally related transactions. State Appraiser Certification and Licensing Boards; federal, state, and local agencies, appraisal services; and appraisal trade associations require compliance with USPAP. USPAP includes a variety of standards of professional practice for all appraisal disciplines. The 2020-2021 edition is valid through December 2022. The USPAP includes the standards of professional practice, guidance from the Appraisal Standards Board and a host of changes and revisions.