D.C. Mun. Regs. tit. 3, § 431
431.1 A subpoena or a notice of a deposition shall be served by a non-party at least 18 years of age upon a person by delivering a copy of the subpoena or notice to the named person, pursuant to this section.
431.2 If a person is represented in a proceeding by counsel, a subpoena or a notice may be served upon the person's counsel.
431.3 Service of a subpoena or a notice of deposition and fees to an individual may be made by any of the following means:
431.4 When the person to be served is not an individual, a copy of the subpoena or notice of the deposition and fees shall be delivered by one (1) of the following ways:
431.5 The Board may, upon the failure by any person to obey a subpoena served upon that person apply to the D.C. Superior Court for an order requiring the person to appear before the Board to give testimony, produce evidence or both. If a person fails to obey the order without an adequate excuse, the Board may apply for an
order that the person be held on contempt by the court.
SOURCE: Final Rulemaking published at 45 DCR 7349 (October 9, 1998); as amended by Final Rulemaking published at 50 DCR 11071 (December 26, 2003); as amended by Final Rulemaking published at 70 DCR 015793 (December 15, 2023).