D.C. Code § 34-1406: Permits for repair, extension, and enlargement of conduits.

The Mayor of the District of Columbia is hereby authorized to grant permits for the repair, enlargement, and extension, under proper regulations to be prescribed by the Council of the District of Columbia, of electric lighting conduits existing on June 6, 1900, and in every conduit constructed or to be constructed under the provisions of this section, 3 ducts shall be reserved for the use of the United States and the District of Columbia.