US lawFederal (United States)RegulationsTitle 10 CFR — EnergyChapter IPart 53Subpart H53.126010 C.F.R. § 53.1260Duration of renewal.Last amended: 2026Year: 2026Length: 20 wordsOfficial source Cite as 10 C.F.R. § 53.1260 (2026)Each renewal of certification for a standard design will be for not less than 10, nor more than 40 years.Previous10 C.F.R. § 53.1257Next10 C.F.R. § 53.1263