The Architect of the Capitol, under the joint direction and supervision of the Senate Office Building Commission and the House Office Building Commission, is authorized to acquire on behalf of the United States, by purchase, condemnation, transfer, or otherwise, such publicly or privately owned real property in the District of Columbia (including all alleys, and parts of alleys, and streets within the curblines surrounding such real property) located in the vicinity of the United States Capitol Grounds, as may be approved jointly by the Senate Office Building Commission and the House Office Building Commission, for the purpose of constructing on such real property, in accordance with this section, a suitable dormitory and classroom facilities complex for pages of the Senate, the House of Representatives, and the Supreme Court of the United States.