D.C. Code § 10-103

The Administrator of General Services is authorized, subject to the approval of the National Capital Planning Commission, to lease, for a term not exceeding 5 years, and to renew such lease, subject to such approval, for an additional term not exceeding 5 years, pending need for their immediate use in other ways by the public, and on such terms as the Administrator shall determine, land or any existing building or structure on land acquired for park, parkway, or playground purposes.