US lawFederal (United States)RegulationsTitle 46 CFR — ShippingChapter I — COAST GUARD, DEPARTMENT OF HOMELAND SECURITYPart 64 — MARINE PORTABLE TANKS AND CARGO HANDLING SYSTEMSSubpart B — Standards for an MPT64.2146 C.F.R. § 64.21Material.Last amended: 2024Year: 2026Length: 29 wordsOfficial source Cite as 46 C.F.R. § 64.21 (2026)The material for a tank must meet the requirements in Section VIII of the ASME BPVC (incorporated by reference; see § 64.2). [USCG-2020-0634, 89 FR 50199, June 12, 2024]Cross-references to the CFR64.2Previous46 C.F.R. § 64.19Next46 C.F.R. § 64.23