D.C. Mun. Regs. tit. 11, § 612
612.1 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.
SOURCE: §§ 4502.36 and 4502.37 of the Zoning Regulations, effective May 12, 1958; as amended by Final Rulemaking published at 47 DCR 9741-43 (December 8, 2000), incorporating by reference the text of Proposed Rulemaking published at 47 DCR 8335, 8383 (October 20, 2000).