70 ILCS 805/1
Whenever any area of contiguous territory lying wholly within one county contains one or more natural forests or parks thereof and one or more cities, towns or villages, such territory may be incorporated as a forest preserve district by a referendum passed under Section 18.1 of the Conservation District Act or in the following manner, to wit:
Any 500 legal voters residing within the limits of such proposed district may petition the circuit court of the county in which such proposed district lies, to order the question to be submitted to the legal voters of such proposed district whether or not it shall be organized as a forest preserve district under this act. Such petition shall be addressed to the circuit court of the county in which such proposed forest preserve district is situated and shall contain a definite description of the territory intended to be embraced in such district, and the name of such district. Upon the filing of such petition in the office of the clerk of the circuit court of the county in which such territory is situated, it shall be the duty of such circuit court to fix a day and hour for the public consideration thereof, which shall not be less than 15 days after the filing of such petition. Such circuit court shall cause a notice of the time and place of such public consideration to be published 3 successive days in some newspaper having a general circulation in the territory proposed to be placed in such district. The date of the last publication of such notice shall not be less than 5 days prior to the time set for such public hearing. At the time and place fixed for such public hearing the circuit court shall hear any person owning property in such proposed district who desires to be heard, and if the circuit judge finds that all of the provisions of this act have been complied with, the court shall enter an order fixing and defining the boundaries and the name of such proposed district in accordance with the prayer of the petition. In the event that any other petition or petitions for the organization of a forest preserve district or districts in the same county is filed under this act before the time fixed for the public hearing of the first petition, the circuit court shall postpone the public consideration of the first petition so that the hearing of all petitions shall be set for the same day and hour. In any county where there are 2 or more judges sitting at the time of filing such first petitions the clerk of the circuit court shall cause all petitions filed subsequent to the first petition to be assigned to the judge to whom the first petition is assigned so that all such petitions may be heard by the same judge.
Should 2 or more petitions be filed under this act and come on for hearing at the same time and it shall be found by the circuit court that any of the territory embraced in any one of the petitions is included in or contiguous with the territory embraced in any other petition or petitions, the circuit court may include all of the territory described in such petitions in one district and shall fix the name proposed in the petition first filed as the name for the district. After the entry of the order fixing and defining the boundaries and the name of such proposed district, it shall be the duty of the circuit court to order to be submitted to the legal voters of such proposed district at any election, the question of the organization of such proposed district. The clerk of the circuit court shall certify the order and the question to the proper election officials who shall submit the question to the voters of the proposed district in accordance with the general election law. Notice of the referendum shall contain a definite description of the territory intended to be embraced in such district, and the name of such district.
70 ILCS 805/1