70 ILCS 825/1

In all cases where any Forest Preserve District has heretofore constructed, maintained or operated one or more swimming pools, golf courses, playfields or other recreational facilities, such construction, maintenance or operation is hereby affirmed and declared to have been a proper and valid exercise of the corporate powers of any such Forest Preserve District incidental to those powers specifically granted to any such Forest Preserve District pursuant to "An Act to provide for the creation and management of Forest Preserve Districts," approved June 27, 1913, as amended, notwithstanding that such construction, maintenance or operation was not specifically set forth or enumerated in such Act as a corporate power of any such Forest Preserve District.