55 ILCS 5/5-1014
The county board of each county has the powers enumerated in the Sections following this Section and preceding Section 5-1105, subject to conditions therein stated. Powers conferred on counties are in addition to and not in limitation of their existing powers.
It is the policy of this State that all powers granted, either expressly or by necessary implication, by this Code, other Illinois statute, or the Illinois Constitution to non-home rule counties may be exercised by those counties notwithstanding effects on competition. It is the intention of the General Assembly that the "State action exemption" to the application of federal antitrust statutes be fully available to counties to the extent their activities are authorized by law as stated herein.
55 ILCS 5/5-1014