D.C. Code § 9-502
No public electric lamp shall be maintained by means of overhead wires within either the city limits of Washington or the existing fire limits of the District of Columbia as existing March 2, 1911.
Mar. 2, 1911, 36 Stat. 1011, ch. 192, § 8
1973 Ed., § 7-702.
1981 Ed., § 7-702.
This section is referenced in § 9-501.