The Comptroller General shall have exclusive custody and control over the building located at 441 G Street, N.W., in the District of Columbia, that is generally known as the General Accounting Office Building,^[1] including operation, maintenance, protection, alteration, repair, and assignment of space therein. Such custody and control shall also extend to any machinery, equipment, spare parts and tools located in and usable for the operation and maintenance of the General Accounting Office Building. For the purposes of securing approval of any prospectus detailing proposed alterations of the General Accounting Office Building, as required by section 3307 of title 40, the Comptroller General shall perform the functions assigned to the Administrator of General Services by that section.