US lawFederal (United States)RegulationsTitle 46 CFR — ShippingChapter I — COAST GUARD, DEPARTMENT OF HOMELAND SECURITYPart 128 — MARINE ENGINEERING: EQUIPMENT AND SYSTEMSSubpart C — Main and Auxiliary Machinery128.32046 C.F.R. § 128.320Exhaust systems.Last amended: 2016Year: 2026Length: 28 wordsOfficial source Cite as 46 C.F.R. § 128.320 (2026)No diesel-engine exhaust system need meet the material requirements in § 58.10-5(d)(1)(i) of this chapter if the installation is certified as required by § 128.220(c) of this part.Cross-references to the CFR128.22058.10-5Previous46 C.F.R. § 128.310