70 ILCS 3705/26
Any territory which is contiguous to a public water district organized under this Act and which is not included in any public water district may be annexed to such contiguous public water district in the manner provided by this Section.
A petition, signed by two-thirds of the legal voters residing in the territory sought to be annexed, or if there are no legal voters in the territory, a majority of the owners of record of the land in the territory, and addressed to the circuit court of the county in which the public water district to which annexation is sought was organized, requesting that the territory described in the petition be annexed to such public water district, may be filed with the clerk of such court. The clerk of such court shall thereupon present such petition to the court which shall set a time, place and date for a hearing thereon, which date shall be not less than 20 nor more than 45 days after the date the petition was filed. The court shall give notice of the time, place and date of the hearing by publication in one or more newspapers published in the district, and if there is no such newspaper, in one or more newspapers published in the county and having a general circulation within the public water district and within the territory sought to be annexed thereto, which publication shall be made at least 15 days prior to the date set for the hearing.
70 ILCS 3705/26