D.C. Mun. Regs. tit. 14, § 4005
4005.1 The testimony of witnesses shall be given under oath or affirmation.
4005.2 The testimony of witnesses and the production of documents and records may be compelled by subpoena, which is enforceable by the Superior Court of the District of Columbia.
4005.3 All cost of issuance and service of a subpoena, including witness fees, shall be paid by the party requesting the subpoena, unless the Rent Administrator assumes the cost.
4005.4 Each District of Columbia agency, board, commission, or independent personnel authority shall make its employees available to furnish sworn statements, to provide records, and to appear as witnesses at RACD hearings when requested by the Rent Administrator.
4005.5 When providing statements or testimony in their official capacity, witnesses employed by the District of Columbia shall be on official duty status.
4005.6 Each party and each person appearing at a hearing to testify shall sign an attendance sheet stating his or her name, address, telephone number, and the purpose for which, or the capacity in which, he or she is participating.
4005.7 Attendance sheets shall be made a part of the record.
SOURCE: Notice of Final Rulemaking published at 33 DCR 1336, 1364-65 (March 7, 1986).