D.C. Code § 34-2703.01
To increase safety, and minimize hazard, repair costs, and work to complete a project requiring excavation, DDOT, the Mayor, and all affected utility companies may enter into a Memorandum of Understanding for the use of sharing appropriate information on underground utility locations at the design stage.
Mar. 4, 1981, D.C. Law 3-129, § 4a
Mar. 16, 2021, D.C. Law 23-186, § 2(d)