D.C. Mun. Regs. tit. 3, § 421
421.1 The Board shall ascertain before the hearing whether an interpreter will be required and make appropriate arrangements.
421.2 An oath or affirmation shall be administered to the interpreter orally or in writing.
SOURCE: Final Rulemaking published at 45 D.C. Reg. 432, 447 (January 23, 1998).