D.C. Mun. Regs. tit. 25-A, § 2406
2406.1 Handwashing sinks shall be provided for employees’ use in areas specified in Section 2411 in accordance with the D.C. Plumbing Code (2008) incorporating the International Plumbing Code (2006) or most recent edition, as amended by the D.C. Plumbing Code Supplement (Subtitle F of 12 DCMR).PI
2406.2 If approved, when food exposure is limited and handwashing sinks are not conveniently available, such as in some mobile or temporary food establishments or at some vending machine locations, employees shall use chemically treated towelettes for handwashing.
2406.3 If approved and capable of removing the types of soils encountered in the food operations involved, automatic handwashing facilities may be substituted for handwashing sinks in a food establishment that has at least one (1) handwashing sink.
SOURCE: Final Rulemaking published at 50 DCR 4394 (June 6, 2003); as amended by Final Rulemaking published at 59 DCR 13690 (November 30, 2012).