65 ILCS 55/2

No special tax or special assessment shall be levied or collected except in pursuance of an ordinance passed by the governing body of the city, village or incorporated town, provided, that no special tax or assessment shall be levied or assessed upon any property in an amount in excess of the special benefit which such property shall receive from such project. Such ordinance shall not be deemed conclusive of such benefit, but the question of such benefit and of the amount of the special tax or assessment shall be subject to the review and determination of the court having jurisdiction in the manner hereinafter set forth.