765 ILCS 1080/10: Liability.

(a) Provisions in, or in connection with, a land lease agreement between a public utility and a park district that require a lessee to indemnify or hold harmless the lessor, or the lessor's independent contractors, agents, employees, or indemnitees, including, but not limited to, waivers of subrogation, against liability for damages arising out of bodily injury to persons or damage to property proximately caused by or resulting from negligence, in whole or in part, of the lessor, or its independent contractors, agents, employees, or indemnitees, are against public policy, void, and unenforceable.

(b) Nothing in this Act shall prevent or prohibit a contract, promise, or agreement for a lessor to indemnify or hold harmless any lessee against liability for damages resulting from the sole negligence of the lessor, its agents, or its employees.