D.C. Mun. Regs. tit. 17, § 3907
3907.
3907.1
Each licensee entering into a contract for the performance of any construction work for which a permit is required by applicable District law or regulation shall be responsible for taking such action as may be necessary to ensure that the work is performed only under the authority of the required permit and in accordance with all of its terms.
Source: Final Rulemaking published at 56 DCR 3103 (April 24, 2009).