D.C. Mun. Regs. tit. 27, § 209
209.1 Both parties may elect to waive a fact-finding hearing and to submit the case on the record.
209.2 Submission of the case without a hearing shall not relieve the parties from providing the facts supporting their allegations and defenses.
209.3 Either party may apply to the Board to supplement the record by filing affidavits, depositions, admissions, answers to interrogatories, and stipulations.
209.4 The Board may permit the record to be supplemented by oral argument and briefs.
SOURCE: Final Rulemaking published at 49 DCR 2078 (March 8, 2002); as amended by Final Rulemaking published at 67 DCR 1734 (February 21, 2020).