33 C.F.R. § 183.520 Fuel tank vent systems.
Title 33 - Navigation and Navigable Waters
(a) Each fuel tank must have a vent system that prevents pressure in the tank from exceeding 80 percent of the pressure marked on the tank label under §183.514(b)(5). (b) Each vent must: (1) Have a flame arrester that can be cleaned unless the vent is itself a flame arrestor; and (2) Not allow a fuel overflow at the rate of up to two gallons per minute to enter the boat. [CGD 74–209, 42 FR 5950, Jan. 31, 1977, as amended by CGD 77–98, 42 FR 36253, July 14, 1977]
Title 33: Navigation and Navigable Waters
PART 183—BOATS AND ASSOCIATED EQUIPMENT
Subpart J—Fuel Systems
Equipment Standards
§ 183.520 Fuel tank vent systems.

