Commonly Referenced Secretary of the Interior's Standards for the Treatment of Historic Properties Within the Secretary of the Interior's Standards for Archeology and Historic Preservation, there are specific standards for the treatment of historic properties.These treatment standards define approaches to the maintenance, repair, and replacement of historic material., The accompanying Guidelines apply the Standards and describe specific treatments that do and do not meet the Standards. The Standards for Rehabilitation are codified in 36 CFR Part 67, are regulatory for the Historic Preservation Tax Incentives program, and are the Standards most often used by local historic district commissions nationwide., Summary. The National Historic Preservation Act (NHPA) Section 112 and the Section 106 regulations, at §800.2(a)(1), require agencies responsible for protecting historic properties to ensure that all actions taken by their employees or contractors meet professional standards as determined by the Secretary of the Interior., secretary’s standards for rehabilitation (the “tax-related rehabilitation standards”), 36 c.f.r. § 67.7 appendix b: department of the interior regulations on the secretary’s standards for the treatment of historic properties (the “standards”), 36 c.f.r. § 68.3 appendix c: national park service tax-incentive guidance, Historic Places. The Secretary of the Interior’s Standards for the Treatment of Historic Properties, apply to all proposed development grant-in-aid projects assisted through the National Historic Preservation Fund, and are intended to be applied to a wide variety of resource types, including buildings, sites, structures, objects, and districts., The “Secretary of the Interior’s Standards for Historic Preservation Projects” were initially prepared in 1979 by W. Brown Morton III and Gary L. Hume. The updated and In the past several years, the most frequent use of the Secretary’s “Standards for Rehabilitation” has been.