40 U.S.C. § 8121 - U.S. Code - Unannotated Title 40. Public Buildings, Property, and Works § 8121. Improper appropriation of streets

(1) prevent the improper appropriation or occupation of any public street, avenue, square, or reservation in the District of Columbia that belongs to the Federal Government;

(2) reclaim the street, avenue, square, or reservation if unlawfully appropriated;

(3) prevent the erection of any permanent building on property reserved to or for the use of the Government, unless plainly authorized by law; and

(4) report to Congress at the beginning of each session on the Secretary's proceedings in the premises, together with a full statement of all property described in this subsection, and how, and by what authority, the property is occupied or claimed.