D.C. Code § 5-411

The Mayor of the District of Columbia is authorized to install under such rules and regulations as the Council of the District of Columbia may prescribe, in any suburb of the said District, such extra apparatus and appliances belonging to the Fire Department of the District of Columbia as may, in his opinion, be available for the use of any volunteer fire organization which may be created in such suburb; and such apparatus and appliances shall be maintained in proper condition for service by the purchase of the necessary supplies out of the appropriations provided for the Fire Department of the District of Columbia.