The Program Comment for the General Services Administration (GSA) sets forth the way in which GSA will comply with Section 106 of the National Historic Preservation Act for select repairs and upgrades to windows, lighting, roofing, and heating, ventilating, and air-conditioning (HVAC) systems within historic public buildings.  The select repairs and upgrades correspond to GSA's Technical Preservation Guidelines. A model federal agency alternative pursuant to Section 800.14(e) of ACHP’s regulations, the Program Comment allows streamlined reviews for select GSA repair and upgrade projects. In 2018, ACHP amended the Program Comment, extending its term for fifteen years and adjusting reporting requirements.