65 ILCS 5/1-2-4
All ordinances of cities, villages and incorporated towns imposing any fine, penalty, imprisonment, or forfeiture, or making any appropriation, shall (1) be printed or published in book or pamphlet form, published by authority of the corporate authorities, or (2) be published at least once, within 30 days after passage, in one or more newspapers published in the municipality, or if no newspaper is published therein, then in one or more newspapers with a general circulation within the municipality. If there is an error in printing, the publishing requirement of this Act shall be satisfied if those portions of the ordinance that were erroneously printed are republished, correctly, within 30 days after the original publication that contained the error. The fact that an error occurred in publication shall not affect the effective date of the ordinance so published. If the error in printing is not corrected within 30 days after the date of the original publication that contained the error, as provided in the preceding sentence, the corporate authorities may by ordinance declare the ordinance that was erroneously published to be nevertheless valid and in effect no sooner than the tenth day after the date of the original publication, notwithstanding the error in publication, and shall order the original ordinance to be published once more within 30 days after the passage of the validating ordinance. In municipalities with less than 500 population in which no newspaper is published, publication may instead be made by posting a notice in 3 prominent places within the municipality. An annual appropriation ordinance adopted under Section 8-2-9 shall take effect upon passage, but no other ordinance described in this paragraph shall take effect until 10 days after it is so published, except that an ordinance imposing a municipal retailers' occupation tax adopted under Section 8-11-1, or a Tourism, Convention and Other Special Events Promotion Tax adopted under Section 8-3-13, or effecting a change in the rate thereof shall take effect on the first day of the month next following the expiration of the 30 day publication period. However, ordinances establishing rules and regulations for the construction of buildings or any part thereof, or for the development or operation of camps accommodating persons in house trailers, house cars, cabins or tents, where such rules and regulations have been previously printed in book or pamphlet form, may by their terms provide for the adoption of such rules and regulations or portions thereof by reference thereto without further printing, or publication, if not less than one copy of such rules and regulations in book or pamphlet form has been filed in the office of the clerk of the municipality for use and examination by the public at least 30 days prior to the adoption thereof.
All other ordinances, resolutions and motions, shall take effect upon their passage unless they otherwise provide.
This Section applies to incorporated towns even if the Section's provisions are in conflict with the charters of such incorporated towns.
Anything in this Section to the contrary notwithstanding, any ordinance which contains a statement of its urgency in the preamble or body thereof, other than an ordinance adopted under Article 8 of this Code, may take effect immediately upon its passage provided that the corporate authorities, by a vote of 2/3 of all the members then holding office, so direct. The decision of the corporate authorities as to the urgency of any ordinance shall not be subject to judicial review except for an abuse of discretion.
65 ILCS 5/1-2-4