D.C. Code § 2-1010
There is authorized to be appropriated, each year, in the annual District of Columbia appropriation act, a sum not exceeding $.01 for each inhabitant of the continental United States as determined by the last preceding decennial census, said sum to be used by said Commission for the payment of its expenses and for the acquisition of the lands herein authorized to be acquired by said Commission for the purposes named, the compensation for the land, the expense of surveys, ascertainment of title, condemnation proceedings, if any, and necessary conveyancing to be paid from said appropriations. The funds so appropriated shall be paid from the revenues of the District of Columbia and the general funds of the Treasury in the same proportion as other expenses of the District of Columbia. The land so acquired within the District of Columbia shall be a part of the park system of the District of Columbia and be under control of the Director of the National Park Service. Areas suitable for playground purposes may, in the discretion of said Commission, be assigned to the control of the Mayor of the District of Columbia for playground purposes. The land so acquired outside the District of Columbia shall be controlled as determined by agreement between said Commission and the proper officers of the States of Maryland and Virginia, such agreements to be subject to the approval of the President.
D.C. Code § 2-1010