D.C. Mun. Regs. tit. 4, r. 4-433
In the interests of justice, the Commission may reopen sua sponte any matter previously closed.
Any party may apply in writing to the Chairperson at any time for reopening of a previously closed proceeding upon discovery of competent, relevant, and material evidence that was not reasonably discoverable during the course of the proceeding.
The party seeking reopening of a previously closed proceeding shall serve the application for reopening on all parties in accordance with § 411. Parties opposing reopening may file replies within fifteen (15) calendar days of receipt of the application for reopening.
The Chairperson shall assign the matter to a Hearing Tribunal for review of the application, the replies, and the new evidence. Whenever possible, the matter shall be assigned to the Hearing Tribunal that rendered the challenged Final Decision and Order. The Hearing Tribunal shall enter an order denying the application or prescribing further processing of the matter as justice may require.
D.C. Mun. Regs. tit. 4, r. 4-433