70 ILCS 860/40: Award.

The forest preserve or conservation district may award the contract to the highest overall ranked entity. Notice of award shall be made in writing. Unsuccessful entities shall also be notified in writing. The forest preserve or conservation district may not request a best and final offer after the receipt of proposals. The forest preserve or conservation district may negotiate with the selected design-build entity after award but prior to contract execution for the purpose of securing better terms than originally proposed, provided that the salient features of the request for proposal are not diminished.