A bill to direct the Architect of the Capitol and the District of Columbia to enter into an agreement for the conveyance of certain real property, to direct the Secretary of the Interior to permit the District of Columbia and the Washington Metropolitan Area Transit Authority to construct, maintain, and operate certain transportation improvements on Federal property, and to direct the Architect of the Capitol to provide the Washington Metropolitan Area Transit Authority access to certain real property.

(Measure passed House, amended)

Directs the Architect of the Capitol and the District of Columbia to enter into an agreement for the conveyance of real property to the United States for the relocation of the United States Botanic Garden's Poplar Point Greenhouse and Nursery. Directs that the District of Columbia convey the Lanham Tree Nursery to the Secretary of the Interior (Secretary) on behalf of the United States.

Provides that, within 60 days of the enactment of this Act, the real property known as the Botanic Garden Greenhouse and Nursery at Poplar Point shall come within the jurisdiction of the Secretary. Directs the Secretary to permit the District of Columbia and the Washington Metropolitan Area Transit Authority to construct, maintain, and operate certain transportation improvements on such real property. Directs the Architect of the Capitol to provide the Washington Metropolitan Area Transit Authority access to real property transferred to the United States for the purposes of conducting any and all necessary surveys, studies, evaluations and tests for the purpose of constructing a rail line tunnel.