Indebtedness of district; additional bonds. For the purpose of making capital improvements to any land acquired or to be acquired by the district and repairs, reconstruction, rehabilitation, or renovation in connection with any buildings of the district or to acquire equipment for the district, the corporate authorities of the forest preserve district in which the improvements or buildings are maintained may from time to time incur indebtedness and issue bonds therefor in amounts not exceeding, in the aggregate, $50,000,000. The 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 for 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 the district shall provide for the levy of a direct annual tax upon all the taxable property in the district, sufficient to pay and discharge the principal of the 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 that the district is or may be authorized to levy.