735 ILCS 30/10-5-80
When compensation is ascertained, as provided in this Act , if the party in whose favor the compensation is ascertained appeals the order or judgment ascertaining just compensation, the plaintiff shall, notwithstanding, have the right to enter upon the use of the property upon entering into bond, with sufficient surety, payable to the party interested in the compensation, conditioned for the payment of compensation in the amount finally adjudged in the case and, in case of appeal by the plaintiff, the plaintiff shall enter into like bond with approved surety. The bonds shall be approved by the court in which the proceeding is had and executed and filed within the time fixed by the court. However, if the plaintiff is the State of Illinois, no bond shall be required.
735 ILCS 30/10-5-80