CFR›Title 49›Subtitle B›Chapter I›Part 178›Subpart J›49 CFR 178.338 Citation49 CFR 178.338CorpusDaily eCFRDisplayed edition2026-09-24Last updated2026-09-24 § 178.338 Specification MC-338; insulated cargo tank motor vehicle. Previous 178.337-18 § 178.337-18 Certification. Next 178.338-1 § 178.338-1 General requirements.