The Society of Architectural Historians' Heritage Conservation Committee has updated the Guidelines for Architectural Historians Testifying on the Historical Significance of Properties. The guidelines are available on the Preservation Advocacy page.
The first version of these guidelines was prepared by SAH's Committee on Preservation and were adopted by the SAH Board of Directors on 2 April 1986. The guidelines have received the official support of the National Alliance of Preservation Commissions, the National Conference of State Historic Preservation Officers, and the Vernacular Architecture Forum. The document was further updated and revised and approved by the SAH Board on 9 November 2004. The document was significantly revised by the SAH Heritage Conservation Committee on 7 May 2017 and approved on 10 May 2019.