D.C. Mun. Regs. tit. 14, § 1107
1107.1 All rooms in which food or drink is prepared, or in which food or drink is served, or in which utensils are washed, shall be reasonably ventilated.
SOURCE: The Housing Regulations of the District of Columbia, 5G DCRR § 4205, Commissioners' Order 55-1503 (August 11, 1955).