CFR › Title 46 › Part 154 › §154.41846 CFR §154.418Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkAn integral tank must not be designed for a temperature colder than −10 °C (14 °F), unless the tank is specially approved by the Commandant (CG-ENG).