65 ILCS 5/9-3-8
After the public hearing has been held as provided in Section 9-3-7, and after the plans, specifications and estimate of cost have been filed in the office of the recording officer of the municipality, the corporate authorities shall by resolution, set a date for consideration and passage of the ordinance, and direct that notice be given by posting or publication of the date set for consideration of said ordinance. Such notice, if posted, shall be posted in not less than 3 public places in such municipality not less than 10 days prior to the date set for such consideration. If published such notice shall be published at least once in a newspaper published and of general circulation in the municipality, if there be such a newspaper, not less than 10 days prior to the date set for the consideration of the ordinance. If no newspaper of general circulation is published within the municipality then no publication shall be necessary and notice given by posting will be sufficient. Such notice by posting or by publication shall describe generally the improvement proposed to be made, set the boundaries of the area probably benefited, and provide that the owners of record of real estate within the area may at any time, prior to the date set for consideration of the ordinance authorizing the improvement, protest in writing against the construction of such improvement. If the owners of record of 70% or more of the area of the real estate located within the area described as probably benefited, file a written protest in the office of the recording officer (to be designated in the posting or publication) prior to the date set for consideration of the ordinance authorizing the improvement, then the corporate authorities of such municipality shall not pass the ordinance, and the improvement shall not again be initiated for a period of 6 months.
65 ILCS 5/9-3-8