72 Pa. Stat. § 402
Except as may otherwise be provided by law it shall be the duty of the Department of the Auditor General to make all audits of transactions after their occurrence, which may be necessary, in connection with the administration of the financial affairs of the government of this Commonwealth, with the exception of those of the Department of the Auditor General. It shall be the duty of the Governor to cause such audits to be made of the affairs of the Department of the Auditor General.
At least one audit shall be made each year of the affairs of every department, board, and commission of the executive branch of the government, and all collections made by departments, boards, or commissions, and the accounts of every State institution, shall be audited quarterly.
Special audits of the affairs of all departments, boards, commissions or officers, may be made whenever they may, in the judgment of the Auditor General, appear necessary, and shall be made whenever the Governor shall call upon the Auditor General to make them.
Copies of all audits made by the Department of the Auditor General shall be promptly submitted to the Governor.
Unless the Department of the Auditor General shall fail or refuse to make annual, quarterly, or special audits, as hereinabove required, it shall be unlawful for any other administrative department, any independent administrative board or commission, or any departmental administrative or advisory board or commission, to expend any money appropriated to it by the General Assembly for any audit of its affairs, or, in the case of departments, of any boards or commissions connected with them, except for the reimbursement of the General Fund for audits made by the Department of the Auditor General as provided by law, or for the payment of the compensation and expenses of such auditors as are regularly employed as part of the administrative staffs of such departments, boards, or commissions, respectively.
72 P.S. § 402