As used in this subpart:
``Fuel'' means gasoline.
``Open to the atmosphere'' means a compartment that has at least 15 square inches of open area directly exposed to the atmosphere for each cubic foot of net compartment volume. [CGD 76-082, 44 FR 73027, Dec. 17, 1979, as amended by CGD 85-098, 52 FR 19729, May 27, 1987]