D.C. Mun. Regs. tit. 11, r. 11-X900
Except for those special exceptions heard by the Zoning Commission pursuant to Title 11 DCMR, special exception cases shall be heard by the Board of Zoning Adjustment and follow the procedures of Subtitle Y, Chapter 4.
The Board of Zoning Adjustment is authorized to grant special exceptions, as provided in this title, where, in the judgment of the Board of Zoning Adjustment, the requested special exception meets the standards of Subtitle X § 901 and any specific conditions specified in this title.
In the case of a use that was originally permitted and lawfully established as a matter-of-right and for which the Zoning Regulations now require special exception approval from the Board of Zoning Adjustment, any extension or enlargement of that use shall require special exception approval from the Board of Zoning Adjustment.
In determining whether to approve any extension or enlargement under Subtitle X § 900.3, the Board of Zoning Adjustment shall apply the standards and criteria of the Zoning Regulations to the entire use, rather than to just the proposed extension or enlargement.
D.C. Mun. Regs. tit. 11, r. 11-X900