reprogramming guidelines of the appropriate Committees of the House and Senate: Provided further , That the difference between the funds appropriated and expended on any projects in this or any prior Act, under the heading Repairs and Alterations , may be transferred to Basic Repairs and Alterations or used to fund authorized increases in prospectus projects: Provided further , That the amount provided in this or any prior Act for Basic Repairs and Alterations may be used to pay claims against the Government arising from any projects under the heading Repairs and Alterations or used to fund authorized increases in prospectus projects