Where necessary for such electrification, the Mayor of the District of Columbia may issue permits to construct conduit systems through or under the surfaces of public streets or other District of Columbia or United States property; provided, however, that 3 ducts therein shall be reserved for the use of the United States and the District of Columbia.
D.C. Code § 9-1207.03
Electrical wiring and conduit systems, see §§ 34-1401 et seq. and 34-2501 et seq. .