65 ILCS 5/11-66-9
Every municipal coliseum shall be for the free use and benefit of the inhabitants of the municipality wherein the coliseum is established, for lectures, concerts, public assemblies, other general educational purposes, and for the purpose of maintaining free amusements and entertainments. All of these uses shall be subject to such reasonable rules and regulations as the board of directors may adopt in order to render the use of the property of the greatest benefit to the greatest number. The board of directors has the power to temporarily lease the coliseum, when not in use for public purposes, for any reasonable and legitimate private use, on such terms as they may prescribe. When so temporarily leased, an admission fee may be charged by the lessees. All rentals received shall be paid to the municipal treasurer, and by him deposited to the credit of the municipal coliseum fund.
65 ILCS 5/11-66-9