(30 ILCS 500/20-5)
    Sec. 20-5. Method of source selection. Unless otherwise authorized by law, all State contracts shall be awarded by competitive sealed bidding, in accordance with Section 20-10, except as provided in Sections 20-15, 20-20, 20-25, 20-30, 20-35, 30-15, and 40-20.
(Source: P.A. 90-572, eff. date - See Sec. 99-5.)