65 ILCS 5/3.1-10-30
Before entering upon the duties of their respective offices, all municipal officers, except alderpersons and trustees, shall execute a bond with security, to be approved by the corporate authorities. The bond shall be payable to the municipality in the penal sum directed by resolution or ordinance, conditioned upon the faithful performance of the duties of the office and the payment of all money received by the officer, according to law and the ordinances of that municipality. The bond may provide that the obligation of the sureties shall not extend to any loss sustained by the insolvency, failure, or closing of any bank or savings and loan association organized and operating either under the laws of the State of Illinois or the United States in which the officer has placed funds in the officer's custody, if the bank or savings and loan association has been approved by the corporate authorities as a depository for those funds. In no case, however, shall the mayor's bond be fixed at less than $3,000. The treasurer's bond shall be an amount of money that is not less than 3 times the latest Federal census population or any subsequent census figure used for Motor Fuel Tax purposes. Bonds shall be filed with the municipal clerk, except the bond of the clerk, which shall be filed with the municipal treasurer.
65 ILCS 5/3.1-10-30