55 ILCS 5/5-45035

Proposals must be properly identified and sealed. Proposals may not be reviewed until after the deadline for submission has passed as set forth in the request for proposals. Proposals shall include a bid bond in the form and security as designated in the request for proposals. Proposals shall also contain a separate sealed envelope with the cost information within the overall proposal submission. Proposals shall include a list of all design professionals, public art designers, and other entities to which any work may be subcontracted during the performance of the contract. Proposals must meet all material requirements of the request for proposal or they may be rejected as non-responsive. The county shall have the right to reject any and all proposals. The drawings and specifications of the proposal may remain the property of the design-build entity. The county shall review the proposals for compliance with the performance criteria and evaluation factors. Proposals may be withdrawn prior to evaluation for any cause. After evaluation begins by the county, clear and convincing evidence of error is required for withdrawal.