D.C. Mun. Regs. tit. 11, § 613
613.1 Use for experimental research or testing laboratory 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: § 4502.38 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, 8383-84 (October 20, 2000).