70 ILCS 810/42
For the purpose of making capital improvements and major repairs in connection with a zoological park, the corporate authorities of the forest preserve district in which such park is maintained may from time to time incur an indebtedness and issue bonds therefor in amounts not exceeding in the aggregate $52,640,000 . Such bonds shall bear interest at not more than the maximum rate provided by law and may mature up to 30 years from the date thereof. A resolution authorizing the issuance of bonds under this Section may be made effective without the submission thereof to the voters of the district for approval.
All moneys received from the issuance of bonds as provided in this Section shall be set apart in a separate fund by the district treasurer and shall be used only for the purposes set forth in this Section.
The corporate authorities of such district shall provide for the levy of a direct annual tax upon all the taxable property in such district, sufficient to pay and discharge the principal of such bonds at maturity and to pay the interest thereon as it falls due. This tax shall be levied and collected in like manner with the general taxes of the forest preserve district and shall be in addition to the maximum of all other taxes and tax rates which the district is or may be authorized to levy.
70 ILCS 810/42