CFR›Title 49›Subtitle B›Chapter I›Part 179›Subpart F›49 CFR 179.400-1 Citation49 CFR 179.400-1CorpusDaily eCFRDisplayed edition2026-09-08Last updated2026-09-08 § 179.400-1 General.A tank built to this specification must comply with §§ 179.400 and 179.401. Previous 179.400 § 179.400 General specification applicable to cryogenic liquid tank car tanks. Next 179.400-3 § 179.400-3 Type.