70 ILCS 1205/9.2-5
Each park district which issues bonds and acquires or constructs or extends or improves indoor or outdoor tennis courts, handball, racquetball, or squash courts, or zoos and facilities shall charge for the use thereof at a rate which at all times is sufficient to pay maintenance and operation costs, depreciation, and the principal and interest on the bonds. Such district may make, enact and enforce all needful rules and regulations for the construction, acquisition, improvement, extension, management, maintenance, care and protection of its courts or zoo and for the use thereof. Charges or rates for the use of the courts or zoo facilities shall be such as the board may from time to time determine.
While any bond issued under Section 9.2-1 of this Article is outstanding such district is required to maintain and operate its tennis, handball, racquetball, or squash courts or zoo facilities as long as it can do so, out of the revenue derived from the operation thereof. It shall not sell, lease, loan, mortgage or in any other manner dispose of the courts or zoo facilities until all of the bonds so issued have been paid in full, both principal and interest, or until provision has been made for the payment of all the bonds and interest thereon in full. Nothing in this Section prohibits any park district from leasing any such indoor or outdoor tennis courts, handball, racquetball, or squash courts, or zoos and facilities to any school district, municipality, or other unit of local government or from entering into any other agreement with any school district, municipality, or other unit of local government by which lease or other agreement such indoor or outdoor tennis courts, handball, racquetball, or squash courts, or zoos and facilities may be operated or used in whole or in part by or for such school district, municipality, or other unit of local government, where such lease or other agreement is not prohibited by the terms of such revenue bonds or the ordinance of the park district authorizing them and where the revenues of the park district derived from such lease or other agreement are deposited in the fund required by Section 9.2-4 of this Act in connection with such revenue bonds.
Such a park district shall install and maintain a proper system of accounts, showing the amount of revenue received from the operation of its tennis, handball, racquetball, or squash courts or zoo. At least once each year, the district shall have the accounts properly audited. A report of this audit shall be open for public inspection at all times.
70 ILCS 1205/9.2-5