D.C. Mun. Regs. tit. 25-A, § 4600
4600
SERVICE OF NOTICE – PROPER METHODS
4600.1
A notice issued in accordance with this Code shall be deemed properly served if it is served by one (1) of the following methods:
(a) A Department representative, a law enforcement officer, or person authorized to serve a civil process personally services the notice and service is made to the licensee, the person in charge, or person operating a food establishment without a license;
(b) The Department sends the notice to the last known home or business address of the licensee or person operating a food establishment without a license in accordance with § 205 of the Department of Consumer and Regulatory Affairs Civil Infractions Act of 1985, effective October 5, 1985 (D.C. Law 6-42; D.C. Official Code § 2-1802.05 (2011 Supp.)), or by other public means so that a written acknowledgment of receipt may be acquired; or
(c) For civil infraction penalties, the notice is provided by the Department in accordance with 16 DCMR § 3102.
SOURCE: Final Rulemaking published at 50 DCR 4394 (June 6, 2003); as amended by Final Rulemaking published at 59 DCR 13690 (November 30, 2012).