65 ILCS 5/8-6-2
For the purpose of creating a working cash fund, the corporate authorities may incur an indebtedness and issue bonds therefor in an amount not exceeding in the aggregate $20,000,000 in addition to all bonded indebtedness authorized for that purpose prior to July 1, 1949.
These bonds shall bear interest at a rate of not more than the maximum rate authorized by the Bond Authorization Act, as amended at the time of the making of the contract, and shall mature within 20 years from the date thereof. The corporate authorities may provide that the ordinance authorizing the issuance of these bonds shall be operative and valid without the submission thereof to the electors of the municipality for approval in accordance with the requirements of Sections 8-4-1 and 8-4-2. The corporate authorities before or at the time of issuing these bonds, shall provide for the collection of a direct annual tax upon all the taxable property in the issuing municipality, sufficient to pay and discharge the principal thereof at maturity and to pay the interest thereon as it falls due. The amendatory Acts of 1971, 1972 and 1973 are not a limit upon any municipality which is a home rule unit.
With respect to instruments for the payment of money issued under this Section either before, on, or after the effective date of this amendatory Act of 1989, it is and always has been the intention of the General Assembly (i) that the Omnibus Bond Acts are and always have been supplementary grants of power to issue instruments in accordance with the Omnibus Bond Acts, regardless of any provision of this Act that may appear to be or to have been more restrictive than those Acts, (ii) that the provisions of this Section are not a limitation on the supplementary authority granted by the Omnibus Bond Acts, and (iii) that instruments issued under this Section within the supplementary authority granted by the Omnibus Bond Acts are not invalid because of any provision of this Act that may appear to be or to have been more restrictive than those Acts.
65 ILCS 5/8-6-2