49 C.F.R. § 178.255-3 Expansion domes.
Title 49 - Transportation
(a) Expansion domes, if applied, must have a minimum capacity of one percent of the combined capacity of the tank and dome. (b) [Reserved]
Title 49: Transportation
PART 178—SPECIFICATIONS FOR PACKAGINGS
Subpart H—Specifications for Portable Tanks
§ 178.255-3 Expansion domes.