US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 61 — NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTSSubpart D — National Emission Standard for Beryllium Rocket Motor Firing61.4040 C.F.R. § 61.40Applicability.Last amended: 2016Year: 2026Length: 12 wordsOfficial source Cite as 40 C.F.R. § 61.40 (2026)The provisions of this subpart are applicable to rocket motor test sites.Next40 C.F.R. § 61.41