Developed in 1986 by the Ad Hoc Committee on Uniform Standards and copyrighted in 1987 by The Appraisal Foundation, USPAP forms the guidelines followed by every licenced and certified real estate appraiser in the United States. The purpose of these Standards is to establish requirements for professional appraisal practice, which includes appraisal, appraisal review, and appraisal consulting. The intent of these Standards is to promote and maintain a high level of public trust in professional appraisal practice.