70 ILCS 1205/8-15
In addition to the other powers and authority now possessed by it, every park district shall have the power and authority to purchase or improve or repair any real estate, equipment, machinery and other personal property for public purposes under contracts providing for payment in installments. Any such contract heretofore or hereafter entered into may be refinanced at any time by means of a refunding loan agreement. Each such contract or refunding loan agreement may provide for installment payments of principal and interest to be made at stated intervals during a certain period not to exceed 20 years. Interest paid on the principal balance outstanding may be at any rate or rates permitted on park district bonds and may be adjusted on such date or dates as are specified in the contract or refunding loan agreement, provided that the rate of interest resulting from the adjustment on such date or dates shall not exceed the greater of (i) the maximum rate of interest permitted on park district bonds on the date such contract or refunding loan agreement was made by such park district; or (ii) the maximum rate of interest permitted on park district bonds on the interest adjustment date specified in the contract or refunding loan agreement. No contract or refunding loan agreement for the same real estate or personal property may exceed an aggregate of 20 years.
Every park district may, in such contract or refunding loan agreement, irrevocably contract to issue general obligation bonds or notes from time to time as permitted by law and to apply the proceeds thereof to the payment of principal and interest on the contract or refunding loan agreement. Notwithstanding any change in law subsequent to the making of such irrevocable contract to issue bonds or notes, every park district making such irrevocable contract shall be authorized to issue such bonds or notes as though the laws relating to park district bonds and notes in effect at the time of the making of such irrevocable contract were in full force and effect until all of the installments on the contract or refunding loan agreement have been paid in full. The State of Illinois pledges and agrees that it will not limit or alter the rights and powers vested in park districts in this paragraph of this Section so as to impair the terms of any such irrevocable contract until each contract and refunding loan agreement is paid in full.
The provisions of this Section shall not, however, be construed in any manner whatsoever to permit the issuance of bonds or notes without referendum except as provided in Article 6 of "The Park District Code" at the time such irrevocable contract is made.
In connection with any contract or refunding loan agreement authorized by this Section, every park district may issue certificates evidencing the indebtedness incurred pursuant to such contract or refunding loan agreement in such number, denomination and form as the park district shall determine. The indebtedness incurred under this Section when aggregated with existing principal indebtedness may not exceed the debt limits provided in Section 6-2 of "The Park District Code"; provided, however, that the interest to be paid on obligations incurred pursuant to this Section shall not be included in any computation of indebtedness.
70 ILCS 1205/8-15