70 ILCS 1505/25.5
Whenever revenue bonds are issued under sections 25.1 to 25.9, both inclusive, of this Act as now enacted and as may hereafter be amended, the revenues derived from the operation of the project shall be set aside as collected and be deposited in a separate fund, separate and apart from all other funds of such Chicago Park District, and be used in paying the cost of maintenance and operation, paying the principal of and interest upon the bonds of such Chicago Park District, issued under sections 25.1 to 25.9, both inclusive, of this Act as now enacted and as may hereafter be amended, and for the transfer of any surplus amounts annually to the general corporate fund of said Chicago Park District only when and in the manner permitted and authorized in accordance with the covenants and provisions and terms of the ordinance authorizing the issuance of any such bonds under the provisions of sections 25.1 to 25.9, both inclusive, of this Act as now enacted and as may hereafter be amended.
70 ILCS 1505/25.5