620 ILCS 45/7
In all cases where property or property rights are acquired or sought to be acquired by the Board of Directors by condemnation, the procedure shall be in the name of the county in which such airport is located and the procedure shall be as nearly as may be in accordance with that provided for the exercise of the right of eminent domain under the Eminent Domain Act . The Board of Directors shall adopt a resolution setting forth the necessity for such condemnation, the description of the land required and the purposes therefor, stating the facts pertaining to the negotiations by the Board of Directors and the owner or owners of such land or air rights above such land, and the fact that the directors and the owner or owners thereof cannot agree upon the price therefor, or that the title thereto, or the air rights thereon cannot be obtained except by condemnation for the reason of the legal disability of the owner or owners thereof or persons interested therein as the case may be, and cause a proper authenticated copy of the resolution to be filed with the county board of the county in which such airport is situated. The county board shall then examine the resolution and upon determining that the acquisition of the land or air rights are for the best interests of the airport and the public generally, may authorize the condemnation in the same manner as the county may do for general purposes of the county; provided, that all costs expenses and awards in condemnation shall be paid from the Airport fund.
620 ILCS 45/7