D.C. Code § 10-615
The sum authorized by § 10-614, or any part thereof shall, when advanced, be available to the Mayor of the District of Columbia for the preparation of plans, designs, estimates, models, and specifications; and for architectural and other necessary professional services required for carrying out the provisions of §§ 10-614 to 10-618; and for the construction of a Recorder of Deeds building, including materials and labor, heating, lighting, elevators, plumbing, landscaping, transportation or rental thereof, and all other appurtenances, and the purchase and installation of machinery, furniture, equipment, apparatus, and any and all other expenditures necessary for or incident to the complete construction and equipment for use of the aforesaid building and plant.
D.C. Code § 10-615