70 ILCS 2805/32f
Any ordinance adopted pursuant to the preceding section shall be published in a newspaper published and having a general circulation in the district undertaking the project or, if there is no such newspaper, it shall be posted in at least three of the most public places in the district.
The publication or posting of the ordinance shall include a notice of (1) the specific number of voters required to sign a petition requesting that the question of the adoption of the ordinance be submitted to the electors of the district; (2) the time in which such petition must be filed; and (3) the date of the prospective referendum. The Clerk of the district shall provide a petition form to any individual requesting one.
If no petition for a referendum is filed with the Clerk of the district within 30 after such publication or posting, then, at the expiration of said 30 days, the ordinance shall be in full force and effect. If, however, within said period of 30 days a petition is filed with the clerk, signed by a number of the legal voters within the district equal to 10% or more of the registered voters within the district, asking that the question of acquiring, constructing, purchasing, improving or extending the waterworks, and the issuance of revenue bonds therefor, as provided in the ordinance, be submitted to the electors of the district, the trustees shall certify such question to the proper election officials, who shall submit the question at an election in accordance with the general election law to decide whether the project and issuance of bonds of the district, as set forth in the ordinance, should be approved.
If a majority of the votes cast on the question are in favor thereof, the ordinance shall be in effect. But if a majority of the votes cast on the question are unfavorable, the trustees shall proceed no further and the ordinance shall not take effect.
70 ILCS 2805/32f