50 ILCS 20/20.20

The Commission may award a design-build contract to the highest overall ranked entity. Notice of award shall be made in writing. Unsuccessful entities shall also be notified in writing. The Commission may not request a best and final offer after the receipt of proposals. The Commission 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. This Section is repealed on July 1, 2027; provided that any design-build contracts entered into before such date or any procurement of a project under this Act commenced before such date, and the contracts resulting from those procurements, shall remain effective.