D.C. Mun. Regs. tit. 23, § 1303
1303.1 No licensee, or agent, or employee of a manufacturer, wholesaler, or retailer shall transport into or within the District of Columbia any of the following in a vehicle unless that vehicle bears upon the exterior of both sides of the vehicle, the name of the licensee and the kind and number of the licensee's beverage license in letters not less than three and one-half inches (3 ½ in.) high:
1303.2 If more than twelve (12) containers of spirits or wine, or more than forty-eight (48) containers of beer, are transported in a vehicle not conforming with the requirements of § 1303.1, the person in charge of the transportation shall have in his or her possession a permit from the Board or a bill or memorandum issued by the seller of the alcoholic beverages, showing the following information:
1303.3 Upon demand by any police officer or duly authorized investigator of the Board, the person in charge of the transportation shall exhibit to the officer or investigator the permit, bill, or memorandum.
SOURCE: Final Rulemaking published at 35 DCR 4947 (June 24, 1988); as amended by Final Rulemaking published at 51 DCR 4309 (April 30, 2004); as amended by Final Rulemaking published at 55 DCR 12991 (December 26, 2008- Part 2); as amended by Final Rulemaking published at 67 DCR 14479 (December 11, 2020).