70 ILCS 1205/3-6a
Within one year of the organization of any park district under the provisions of Article 2 of this Act, any territory which has been included therein may be disconnected from such park district if the territory sought to be disconnected is (1) upon the border, but within the boundary of the park district, (2) contains 20 or more acres, (3) if disconnected will not result in the isolation of any part of the park district from the remainder of the park district, (4) if disconnected will not be a territory wholly bounded by one or more park districts or wholly bounded by one or more park districts and a river or lake, and (5) is adjoining another park district, the board of which has on file a petition for annexation of the territory pursuant to the provisions of Article 3-1 of this Act and has enacted an ordinance stating that the park district will annex said territory within 30 days of the entry of an order of disconnection by the Circuit Court, in the following manner:
A written petition filed in the Circuit Court of the county in which the territory proposed to be disconnected is located or if such territory is located in more than one county then in the Circuit Court of the county in which the greater part of such territory may be located, which petition shall be signed by a majority of the electors, if any, residing within the territory, and also signed by a majority of the owners of record of land in such territory, and also representing a majority of the area of land in such territory, shall be filed with the clerk of the Circuit Court within one year of the organization of any park district under the provisions of Article 2 of this Act. The petition shall set forth the description of the territory to be detached from such park district, shall allege the pertinent facts in support of the disconnection of such territory, shall include a certified copy of an ordinance of the adjoining park district with which has been filed a petition for the annexation of the territory, stating that the park district will annex the territory within 30 days after the entry of an order of disconnection by the Circuit Court and shall pray the Circuit Court to detach the territory from the park district.
Upon the filing of the petition, the Circuit Court judge shall set the same for public hearing which date of public hearing shall be within 30 days of the date of the filing of the petition, and the clerk of the Circuit Court shall give at least 20 days notice of such hearing by publishing notice thereof once in a newspaper having a general circulation within such park district. The notice shall refer to the petition filed with the Circuit Court, shall describe the territory proposed to be disconnected, shall indicate the prayer of the petition and the date, time and place at which the public hearing will be held and shall further indicate that the park district and any and all persons residing in or owning property in the territory involved or in the park district from which such territory is sought to be disconnected shall have an opportunity to be heard on the prayer of the petition. Notice of the filing of the petition, the substance of which shall be as hereinabove prescribed for the published notice, shall also be mailed to the commissioners of the park district from which the territory is sought to be disconnected.
The public hearing may be continued from time to time by the Circuit Court. After such public hearing and having heard any and all persons desiring to be heard, including the park district and any and all persons residing in or owning property in the territory involved or in the park district from which such territory is sought to be disconnected, if the Circuit Court finds that the allegations of the petition are true, the court shall grant the prayer of the petition and shall enter a judgment disconnecting the territory from the park district, which judgment shall be filed of record in the Circuit Court and the clerk of the Circuit Court shall cause to be delivered a certified copy of such judgment to the commissioners of the park district from which such territory has been detached. If the Circuit Court finds that the allegations contained in the petition are not true then the court shall enter a judgment dismissing the same.
70 ILCS 1205/3-6a