D.C. Mun. Regs. tit. 27, § 123
123.1 The Board, for good cause shown, may enlarge the time prescribed by the Board rules, or by its order, for doing any act, or may permit an act to be done after the expiration of the prescribed time. The Board, may not, however, enlarge the time for filing a protest or an appeal.
SOURCE: Final Rulemaking published at 49 DCR 2078 (March 8, 2002); as amended by Final Rulemaking published at 67 DCR 1734 (February 21, 2020).