CFR › Title 49 › Part 178 › §178.255-949 CFR §178.255-9Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)When the interior of the tank is divided into compartments, each compartment shall be designed, constructed and tested as a separate tank. Thickness of shell and compartment heads shall be determined on the basis of total tank capacity.(b)[Reserved]