50 ILCS 450/4
The corporate authority of any county having less than 200,000 inhabitants or of any municipality may by resolution:
(4) levy a tax, in addition to all other taxes, for the purpose of amortizing such bonds and specify a maximum rate at which such tax may be extended in relation to the value of all taxable property in the county or municipality, as the case may be, as equalized or assessed by the Department of Revenue.
However, no resolution providing for the issuance of bonds or the levy of taxes authorized by this Act shall be effective until it has been submitted to a referendum of the electors of the acting county or municipality in accordance with the general election law. The question in such referendum shall specify the maximum rate at which the proposed tax may be extended. If a majority of those voting upon the proposition at such referendum vote in favor of issuing such bonds and levying such taxes, then the resolution shall immediately become effective.
(from Ch. 85, par. 924)
(Source: P.A. 81-1489; 81-1509.)