65 ILCS 5/11-45-14

The commissioners, after such band-shell or performing arts structure has been erected, may levy a tax from year to year for such amount as they deem necessary for the maintenance of such structure and surrounding grounds. However, the total amount levied for all of the purposes referred to in these Sections 11-45-7 through 11-45-16 shall not exceed the total which may be authorized by the referendum provided for in Section 11-45-2.