Uniform Appraisal Standards for Federal Land Acquisition (Yellow Book)The Uniform Appraisal Standards for Federal Land Acquisitions, commonly known as Yellow Book, promotes fairness, uniformity and efficiency in the appraisal of real property in federal land acquisitions. The current edition is the sixth edition, published in 2016 by The Appraisal Foundation on behalf of the Interagency Land Acquisition Conference and in cooperation with the United States Department of Justice.