Use for building service trade, including but not limited to plumber, electrician, exterminator, or air conditioning mechanic, shall be permitted in a CR District as a special exception when authorized by the Board of Zoning Adjustment under § 3104, if the Board considers that this use is appropriate in furthering the objectives of the CR Districts, subject to the provisions of § 610.
D.C. Mun. Regs. tit. 11, r. 11-612