(15 ILCS 405/9) (from Ch. 15, par. 209)
    Sec. 9. Warrants; vouchers; preaudit.
    (a) No payment may be made from public funds held by the State Treasurer in or outside of the State treasury, except by warrant drawn by the Comptroller and presented by him to the treasurer to be countersigned except for payments made pursuant to Section 9.03 or 9.05 of this Act.
    (b) No warrant for the payment of money by the State Treasurer may be drawn by the Comptroller without the presentation of itemized vouchers indicating that the obligation or expenditure is pursuant to law and authorized, and authorizing the Comptroller to order payment.
    (b-1) An itemized voucher for under $5 that is presented to the Comptroller for payment shall not be paid except through electronic funds transfer. This subsection (b-1) does not apply to (i) vouchers presented by the legislative branch of State government, (ii) vouchers presented by the State Treasurer's Office for the payment of unclaimed property claims authorized under the Revised Uniform Unclaimed Property Act, or (iii) vouchers presented by the Department of Revenue for the payment of refunds of taxes administered by the Department.
    (c) The Comptroller shall examine each voucher required by law to be filed with him and determine whether unencumbered appropriations or unencumbered obligational or expenditure authority other than by appropriation are legally available to incur the obligation or to make the expenditure of public funds. If he determines that unencumbered appropriations or other obligational or expenditure authority are not available from which to incur the obligation or make the expenditure, the Comptroller shall refuse to draw a warrant.
    (d) The Comptroller shall examine each voucher and all other documentation required to accompany the voucher, and shall ascertain whether the voucher and documentation meet all requirements established by or pursuant to law. If the Comptroller determines that the voucher and documentation do not meet applicable requirements established by or pursuant to law, he shall refuse to draw a warrant. As used in this Section, "requirements established by or pursuant to law" includes statutory enactments and requirements established by rules and regulations adopted pursuant to this Act.
    (e) Prior to drawing a warrant, the Comptroller may review the voucher, any documentation accompanying the voucher, and any other documentation related to the transaction on file with him, and determine if the transaction is in accordance with the law. If based on his review the Comptroller has reason to believe that such transaction is not in accordance with the law, he shall refuse to draw a warrant.
    (f) Where the Comptroller refuses to draw a warrant pursuant to this Section, he shall maintain separate records of such transactions.
    (g) State agencies shall have the principal responsibility for the preaudit of their encumbrances, expenditures, and other transactions as otherwise required by law.
(Source: P.A. 100-22, eff. 1-1-18.)