D.C. Mun. Regs. tit. 24, r. 24-828
Heating and cooking appliances in concession stands shall be those that operate either by electricity or by liquefied petroleum gas.
A permit shall be obtained from the Fire Chief for the use of liquefied petroleum gas.
Each cooking appliance shall be installed on a substantial support so that its burners shall be at least thirty inches (30 in.) above the floor or ground on which the support for the appliance may rest.
If the top of the support required by § 828.3 is constructed of wood or other combustible material, it shall be protected directly under the cooking appliance with at least one-half inch (1/2 in.) of sheet rock or similar fire-resistant material.
Cylinders containing liquefied petroleum gas shall be located at least six feet (6 ft.) from cooking and heating appliances, and shall be of a type acceptable under current U.S. Department of Transportation shipping specifications.
Each stove in which liquefied petroleum gas is used shall be designed for this use. The connection between the stove and any stove cylinder shall be subject to the approval of the Fire Chief.
D.C. Mun. Regs. tit. 24, r. 24-828