US lawFederal (United States)RegulationsTitle 24 CFR — Housing and Urban DevelopmentPart 51 — ENVIRONMENTAL CRITERIA AND STANDARDSSubpart A — General Provisions51.424 C.F.R. § 51.4Program coverage.Last amended: 2017Year: 2026Length: 19 wordsOfficial source Cite as 24 C.F.R. § 51.4 (2026)Environmental standards shall apply to all HUD actions except where special provisions and exemptions are contained in each subpart.Previous24 C.F.R. § 51.2