D.C. Mun. Regs. tit. 16, r. 16-1311
Each non-resident applicant for a certificate of registration, each non-resident registrant, and each resident applicant or registrant who or which becomes a non-resident, shall be deemed to have appointed the Director as his or her agent upon whom may be served any notice or process issued under the authority of the Act or this chapter.
The provisions of § 1311.1 shall not apply if the applicant, in the application, or the registrant appoints and maintains an attorney-in-fact who is a bona fide resident of the District of Columbia to receive service of notice or process and registers the name of the attorney-in-fact with the Director.
Unless within ten (10) days after any change occurs which results in the inability of the registered attorney-in-fact to function as such, the applicant or registrant has appointed a new or additional attorney-in-fact and registers the name of such new or additional attorney-in-fact with the Director, the applicant or registrant shall be deemed to have appointed the Director his agent to receive notice or process to be served on the applicant or registrant under the authority of the Act or this chapter.
D.C. Mun. Regs. tit. 16, r. 16-1311