70 ILCS 1315/1
The corporate authorities of any three towns, for park purposes, having the control or supervision of any public park or parks, are hereby authorized to permit the directors or trustees of any corporation or society organized for the construction or maintenance and operation of a child welfare sanitarium, to erect, maintain and operate its child welfare sanitarium within any public park consisting of more than sixty acres of land and water area now or hereafter under the control or supervision of such corporate authorities, and to contract with any such directors or trustees of any such child welfare sanitarium relative to the erection, maintenance and operation thereof: Provided, that no more than one child welfare sanitarium shall be permitted in any park district under the control of such corporate authorities, and that such corporate authorities shall not allocate for the purposes of such sanitarium more than five acres of park lands.
70 ILCS 1315/1