D.C. Mun. Regs. tit. 22-C, § 9707
9707.1 Any papers filed with the Board or on opposing parties in a contested case shall be served by personal delivery, first class U.S. mail, registered or certified mail, or by electronic mail. Proof of service shall be shown as required by the regulations.
9707.2 Any papers required to be served upon a party may be served upon the party or the party's designated representative.
9707.3 When a party has appeared through a representative, who has filed a written notice of appearance service shall be made upon the representative of record.
9707.4 Service upon a party or the party's designated representative may be made in the following manner:
9707.5 Service upon a party shall be completed upon any of the following acts:
9707.6 Proof of service shall state the name and address of the person served, the manner of service, and the date of service.
9707.7 Proof of service shall be shown by one of the following:
(a) Written acknowledgement of the person served or that person's representative;
(b) The certificate of the person making the service;
(c) A return receipt, if served by registered or certified mail; or
9707.8 Service shall also be deemed proper upon a showing that the party actually received delivery of the notice or paper, irrespective of the delivery method.
SOURCE: Final Rulemaking published at 73 DCR 002136 (February 20, 2026).