D.C. Mun. Regs. tit. 25-B, § 2002
2002.1 The physical facilities shall be cleaned as often as necessary to keep them clean.
2002.2 Except for cleaning that is necessary due to a spill or other accident, cleaning shall be done during periods when the least amount of food is exposed, such as after closing.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).