D.C. Mun. Regs. tit. 25-B, § 1904
1904.1 A sink used for food preparation or utensil washing, or a service sink or curbed cleaning facility used for the disposal of mop water or similar wastes, shall not be provided with the handwashing aids and devices required for a handwashing sink as specified in sections 1902, 1903, and 1906.1.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).