65 ILCS 5/1-1-8
Whenever this Code requires or authorizes the submission of a proposition or question to referendum, whether initiated by action of the corporate authorities or by petition, upon such initiation, the proposition or question shall be certified, in accordance with the general election law, to the proper county clerks and boards of election commissioners. Those election authorities shall submit the proposition or question to the voters of the municipality, or to the voters of such other territory as are entitled to vote thereon, at an election in accordance with the general election law. Whenever this Code requires referendum approval by the voters of any ordinance adopted by a municipality, and no specific procedure is provided for initiating the referendum, the referendum shall be initiated by the passage of such ordinance and shall be certified for the next regular election in accordance with the general election law.
Whenever this Code requires or authorizes a special election to be held for the purpose of filling a vacancy in office, the office and the candidates therefor shall be similarly certified, in accordance with the general election law.
Municipal clerks and clerks of the circuit court shall perform all election duties, including certifications and publication of notices, in connection with the conduct of elections of officers and referenda on the submission of questions or propositions to referendum as provided in the general election law.
65 ILCS 5/1-1-8