; and (4) $2,248,395,000 for building operations to remain available until expended, of which $1,126,014,000 is for building services, and $1,122,381,000 is for salaries and expenses: Provided , That not to exceed 5 percent of any appropriation made available under this paragraph for building operations may be transferred between and merged with such appropriations upon notification to the Committees on Appropriations of the House of Representatives and the Senate, but no such appropriation shall be increased by more than 5 percent by any such transfers: Provided further , That section 521 of this title shall not apply with respect to funds made available under this heading for building operations: Provided further , That the total amount of funds made available from this Fund to the General Services Administration shall not be available for expenses of any construction, repair, alteration and acquisition project for which a prospectus, if required by 40 U.S.C. 3307(a) , has not been approved, except that necessary funds may be expended for each project for required expenses for the development of a proposed prospectus: Provided further , That funds available in the Federal Buildings Fund may be expended for emergency repairs when advance approval is obtained from the Committees on Appropriations: Provided further , That amounts necessary to provide reimbursable special services to other agencies under 40 U.S.C. 592(b)(2) and amounts to provide such reimbursable fencing, lighting, guard booths, and other facilities on private or other property not in Government ownership or control as may be appropriate to enable the United States Secret Service to perform its protective functions pursuant to 18 U.S.C. 3056 , shall be available from such revenues and collections: Provided further , That revenues and collections and any other sums accruing to this Fund during fiscal year 2019, excluding reimbursements under 40 U.S.C. 592(b)(2) , in excess of the aggregate new obligational authority authorized for Real Property