65 ILCS 5/9-3-25
Notice for bids for the construction of the improvement shall be published in at least one issue of a newspaper published and of general circulation in such municipality, if there is one, and if there is no such newspaper then by publishing such notice in some newspaper published in and of general circulation in the county in which such municipality is located. Such publication shall be made at least 10 days prior to the date fixed for the opening of bids for such work, and an additional notice may be published in trade journals or other newspapers as the governing body may determine. The notice for bids shall state (1) the general nature and character of the work to be done; (2) the engineer's estimate of the amount to be paid the contractor, and that no contract will be awarded in excess thereof; (3) when and where bids will be opened; (4) that plans, profiles and specifications for such work and form of contract and bond for completion and maintenance of work are on file in the office of the clerk of such municipality for public inspection; and (5) that each bidder must file with his bid cash or a certified check satisfactory to the governing body in an amount equal to 10% of the estimated amount to be paid the contractor, such cash or certified check to be held by the municipality as damages for failure to execute the contract and bond for performance of such work. Right shall be reserved to reject any or all bids. Such notice shall also state the number of installments the assessment has been divided into and the rate of interest the bonds to be issued in anticipation of the assessment shall bear. Such notice shall be signed by the municipal clerk. If bonds are to be issued in anticipation of the collection of the assessments, the corporate authorities shall, prior to the date set for receiving the bids, fix the rate of interest the bonds are to bear. Such interest rate shall be one per cent less than the interest rate the installments of the assessments are to bear. It shall be stated in the notice whether payment will be made in bonds or cash.
65 ILCS 5/9-3-25