District of Columbia Code Division V. Local Business Affairs § 25-711. Posting and carrying of licenses.

(b) The licensee under a retail license, manufacturer's license, or a club license, shall post, in a conspicuous place on the front window or front door of the licensee's premises, the correct name or names of the licensee or licensees and the class and number of the license in plain and legible lettering not less than one inch nor more than 1.25 inches in height.

(c) A licensee under a temporary license shall have the license available for inspection by any member of the Board, employee of the Board, or member of the Metropolitan Police Department during the event for which the license was issued.

(d) A licensee under a solicitor's license shall, while soliciting orders, carry the license upon his or her person and shall exhibit the license, upon request, to any member of the Board, employee of the Board, or member of the Metropolitan Police Department.

(e) A licensee under a manager's license shall, while managing a licensed establishment, carry the license upon his or her person and shall exhibit the license, upon request, to any member of the Board, employee of the Board, or member of the Metropolitan Police Department.

(f) While managing or working at a licensed establishment, the owner, Board-approved manager, or employees or agents of a retailer, manufacturer, or wholesaler licensee shall carry a valid identification document on his or her person while on duty, including if he or she is outside of the licensed establishment or delivering alcoholic beverages, and shall show the identification document upon request to an ABCA investigator or a member of the Metropolitan Police Department.