D.C. Mun. Regs. tit. 15, § 107
107.1 At the discretion of the Commission, any person may make a limited appearance in any proceeding by presenting a statement orally or in writing at any time prior to the close of the record.
107.2 A person entering a limited appearance shall not be a party to the proceeding and shall not have the right to present testimony or cross-examine witnesses.
SOURCE: Final Rulemaking published at 28 DCR 2984, 2991 (July 3, 1981).