US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter I — PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 179 — SPECIFICATIONS FOR TANK CARSSubpart D — Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)179.202-949 C.F.R. § 179.202-9Top fittings protection.Last amended: 2016Year: 2026Length: 35 wordsOfficial source Cite as 49 C.F.R. § 179.202-9 (2026)The tank car tank must be equipped with top fittings protection conforming to AAR Specifications for Tank Cars, appendix E paragraph 10.2.1 (IBR, see § 171.7 of this subchapter). [80 FR 26749, May 8, 2015]Cross-references to the CFR171.7Previous49 C.F.R. § 179.202-8Next49 C.F.R. § 179.202-12