Illinois Statutes Chapter 65. Municipalities § 5/11-96-5. Municipal and park district tax

(a) If property within a municipality also lies within a park district and the same property is being taxed for park or recreation purposes by both the municipality and the park district, then the corporate authorities of the municipality may adopt an ordinance or resolution to pay all or part of the park district tax for the property according to subsection (b). If the corporate authorities of a municipality adopt a resolution or ordinance under this Section, then the corporate authorities shall certify the action to the county clerk.

(b) Before the county clerk extends the tax levy of the park district, the corporate authorities of the municipality may order the municipal treasurer to pay a specified amount into a special abatement fund held by the county treasurer. The county clerk shall then abate the park district tax extension on the property within the municipality by the amount in the abatement fund by apportioning the abatement amount for each parcel of property according to the assessed value as equalized by the board of review and Department of Revenue. The county treasurer shall then pay the money in the abatement fund to the park district. If the amount in the abatement fund is more than the amount of the current tax levy extended on the property, then the county treasurer shall return the surplus amount to the municipal treasurer.

(c) For the purposes of the Property Tax Extension Limitation Law,  1 the amount of the extension abatement shall continue to be included in the park district's aggregate extension base.

(d) The municipal tax and abatement shall not exceed a period of 10 years.