(a) The sums appropriated by the Commonwealth shall be paid to the board of trustees only upon presentation by them of certified payrolls and vouchers showing expenditures in accordance with the appropriations. The Auditor General shall draw a warrant upon the State Treasurer for payment of approved expenditures. All expenditures made by the board of trustees in respect to such appropriations shall be subject to a post-audit by the Auditor General.

(b) For the purpose of assuring the proper accountability on the part of the University of Pittsburgh for the expenditure of the amounts appropriated by the Commonwealth, the University of Pittsburgh shall establish a Commonwealth Appropriation Account into which only the amounts appropriated by the Commonwealth shall be credited when received. The University of Pittsburgh shall apply the moneys in the Commonwealth Appropriation Account only for such purposes as are permitted in the act appropriating the same and shall at all times maintain proper records showing the application of such moneys. Not later than ninety days after the close of the fiscal year to which the specific appropriation relates, the University of Pittsburgh shall file with the General Assembly and with the Auditor General of the Commonwealth, a statement setting forth the amounts and purposes of all expenditures made from both the Commonwealth Appropriation Account and other university accounts during the fiscal year. Such statement of expenditures shall be reviewed by the Auditor General of the Commonwealth, and he shall have the right, in respect to the Commonwealth Appropriation Account, to audit and disallow expenditures made for purposes not permitted by the appropriation act and to cause such sums to be recovered and paid by the University of Pittsburgh to the Treasurer of the Commonwealth. In respect to expenditures made by the university from accounts other than the Commonwealth Appropriation Account, the Auditor General shall have the right to review only and he shall file annually with the General Assembly such information concerning such expenditures as the General Assembly or any of its committee may require.