70 ILCS 3010/3a
Whenever the board of trustees of a sanitary district determines to improve or extend or to construct or acquire and improve and extend a sewerage system and to issue bonds, under this Act, for the payment of the cost thereof, the board of trustees shall adopt an ordinance describing, in a general way, the contemplated project. It shall not be necessary that the ordinance refer to plans and specifications nor that there be on file for public inspection prior to the adoption of such ordinance detailed plans and specifications of the project.
Whenever a sanitary district has been directed by an order issued under the "Environmental Protection Act", as now or hereafter amended, to abate its discharge of untreated or inadequately treated sewage, this fact shall be set out in the ordinance, unless said order to abate said discharge has been reversed on appeal.
The ordinance shall set out the estimated cost of the project, determine the period of usefulness thereof and fix the amount of revenue bonds proposed to be issued, the maturity or maturities, the interest rate, which shall not exceed the greater of (i) the maximum rate authorized by the Bond Authorization Act, as amended at the time of the making of the contract, or (ii) 8% annually, and all the details in connection with the bonds. The ordinance may contain such covenants and restrictions upon the issuance of additional revenue bonds thereafter, which will share equally the revenue of the sewerage system, as may be deemed necessary or advisable for the assurance of the payment of the bonds first issued. The board of trustees may also provide in the ordinance authorizing the issuance of bonds under this Act that the bonds, or such ones thereof as may be specified, shall, to the extent and in the manner prescribed be subordinated and be junior in standing with respect to the payment of principal and interest and the security thereof, to such other bonds as are designated in the ordinance.
The ordinance shall pledge the revenue derived from the operation of the sewerage system for the purpose of paying the cost of operation and maintenance of the system, providing an adequate depreciation fund and paying the principal and interest on the bonds of the sanitary district issued under this Act. Every sanitary district is authorized to issue refunding revenue bonds to refund, pay or discharge all or any part of its outstanding revenue bonds, including interest thereon, if any, in arrears or about to become due. The relevant provisions in this Act pertaining to revenue bonds shall be equally applicable in the authorization and issuance of refunding revenue bonds, including their terms and security, the bond ordinance, rates, and other aspects of the bonds.
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.
70 ILCS 3010/3a