70 ILCS 1205/2-2
In organizing any park district under this Code not less than 100 legal voters resident within the limits of such proposed park district may petition the circuit judge of the county in which such territory, or the greater or greatest portion thereof, in area, lies, to cause the question to be submitted to the legal voters of such proposed park district whether they will organize as a park district. Such petition shall clearly define the territory intended to be embraced in such district and the name of such proposed district. The petition must include an affidavit attesting that notice of intent to petition for formation of a park district has been published as required by the general election law. In cases coming within the terms of Section 2--2.1 the petition shall also set forth facts showing that the proposed park district meets the requirements of that Section and shall be signed by the number of legal voters required by that Section.
70 ILCS 1205/2-2