70 ILCS 2405/22a.8
Upon the presentation to the board of the proposed ordinance, together with the required recommendation and estimate, if the estimate of costs exceeds the sum of $500,000, exclusive of the amount to be paid for land to be taken or damaged, the ordinance shall be published in the usual way, in full, with the recommendation and estimate, at least 10 days before any action is taken thereon by the board. Whenever any plat, plan, specification, profile or drawing is a part of the ordinance or attached thereto as a part thereof or is referred to by the ordinance, it is not necessary to publish that plat, plan, specification, profile or drawing in connection with the publication of the ordinance. Publication shall be in a newspaper having general circulation within the district.
70 ILCS 2405/22a.8