65 ILCS 5/9-3-26
The committee on local improvements shall meet at the time and place specified by the corporate authorities for receipt of bids and publicly open and declare all bids. Any or all bids may be rejected by such committee on local improvements. If all bids are rejected, new bids may be requested as in the first instance. Whenever a bid is rejected, the deposit required to be made shall be returned to the depositor. Contracts when awarded shall be awarded to the lowest responsible bidder subject to ratification and approval by the corporate authorities. Contracts may be awarded by the committee on local improvements at the meeting at which bids are received, or any adjournment thereof. The committee on local improvements shall report in writing to the corporate authorities at the next regular meeting the action that has been taken relative to bids received. The corporate authorities shall ratify and approve or reject the action taken and direct the committee on local improvements to execute the contract on behalf of the municipality, if an award is made, or in case the award is rejected, to again direct advertisement for bids. No contract shall be awarded for the construction of any improvement under this Division 3 after the expiration of one year from the date of confirmation of the assessment. The municipality shall dismiss and vacate the confirmation of any such assessment. No contract shall be awarded in excess of the estimated amount to be paid the contractor.
65 ILCS 5/9-3-26