50 ILCS 340/1
Every county, park district, sanitary district, or other municipal corporation, holding in its treasury funds which are set aside for use for particular purposes, including any funds that are disbursed to a county or municipality as their share of the taxes collected under the "Motor Fuel Tax Law", but which are not immediately necessary for those purposes, by ordinance, may use those funds, or any of them, in the purchase of tax anticipation warrants issued by the county, park district, sanitary district, or other municipal corporation possessing the funds against taxes levied by that county, park district, sanitary district, or other municipal corporation. These warrants shall bear interest not to exceed four percent annually. All interest upon these warrants, and all money paid in redemption of these warrants, or received from the resale thereof, shall at once be credited to and placed in the particular fund used to purchase the specified warrants. Likewise, every county, park district, sanitary district, or other municipal corporation, by resolution or ordinance may use the money in the specified funds in the purchase of municipal bonds issued by the county, park district, sanitary district, or other municipal corporation, possessing the funds and representing an obligation and pledging the credit of that county, park district, sanitary district, or other municipal corporation, or bonds and other interest bearing obligations of the United States, of the State of Illinois, or of any other state or of any political subdivision or agency of the State of Illinois or of any other state, whether the interest earned thereon is taxable or tax-exempt under federal law, including savings accounts and savings certificates of deposit of any State or National Bank if such accounts and certificates are fully insured by the Federal Deposit Insurance Corporation, withdrawable capital accounts or deposits of State or federal chartered savings and loan associations which are fully insured by the Federal Savings and Loan Insurance Corporation, or treasury notes and other securities issued by agencies of the United States. All interest upon these bonds or obligations and all money paid in redemption of these bonds or obligations or realized from the sale thereof, if afterwards sold, shall at once be credited to and placed in the particular fund used to purchase the specified bonds or obligations.
No bank or savings and loan association shall receive public funds as permitted by this Section, unless it has complied with the requirements established pursuant to Section 6 of "An Act relating to certain investments of public funds by public agencies", approved July 23, 1943, as now or hereafter amended.
This amendatory Act of 1975 is not a limit on any home rule unit.
50 ILCS 340/1