D.C. Mun. Regs. tit. 14, § 3811
3811.1 If two (2) or more persons are entitled to an appeal from an order of the Rent Administrator and their interests are such as to make joinder practicable, they may file a joint notice of appeal, or may move to consolidate their separate appeals by a motion to consolidate.
3811.2 Appeals may be consolidated by the Commission upon its own motion, or upon a motion of a party.
SOURCE: Notice of Final Rulemaking published at 33 DCR 1336, 1343 (March 7, 1986).