D.C. Mun. Regs. tit. 14, § 3906
3906.1 Upon the death of a party, or the dissolution, reorganization, or change of ownership or interest of a party, or a change in the registration statement resulting from an amendment filed under § 4103, the hearing examiner may, upon the motion of a party or upon the hearing examiner's own motion, substitute or add a person, partnership, or corporation.
3906.2 If it appears to the Rent Administrator that the identity of the parties has been incorrectly determined, the Rent Administrator may substitute or add the correct parties on his or her own motion.
3906.3 No substitution or addition of parties may occur unless all necessary parties are provided an opportunity to file written arguments in support of or opposition to a motion for substitution or addition of parties.
3906.4 A hearing on the motion for addition or substitution of parties may be scheduled at the discretion of the hearing examiner.
SOURCE: Notice of Final Rulemaking published at 33 DCR 1336, 1354 (March 7, 1986).