605.1 Each habitable room shall be provided with at least two (2) separate electric outlets, at least one (1) of which shall be a wall or floor convenience outlet.

605.2 Each furnace room, laundry room, stairway, and bathroom shall be provided with at least one (1) electric light outlet.

SOURCE: The Housing Regulations of the District of Columbia, 5G §§ 2404.1 and 2404.2, Commissioners' Order 55-1503 (August 11, 1955).