Illinois Statutes Chapter 735. Civil Procedure § 5/9-218. Rent payments at business office

(a) If the lessor, or agent of the lessor, of residential real property, containing 100 or more residential units in either a single building or a complex of buildings, maintains a business office on the premises of the building or complex that has regularly scheduled office hours, then the lessor, or agent of the lessor, must accept rent payments from a lessee of any of those residential units at that business office during the regularly scheduled office hours and the lessor may not impose any penalty, fee, or charge for making rent payments in this manner that are otherwise considered timely under the lease, but the landlord may refuse to accept payment by cash when rent payments are made in this manner.

(b) This Section applies to each lease and other rental agreement in effect on the effective date of this amendatory Act of the 94th General Assembly unless there is specific language in that lease or other rental agreement that conflicts with the provisions of this Section. If any provision of a lease or other rental agreement entered into, extended, or renewed on or after the effective date of this amendatory Act of the 94th General Assembly conflicts with the provisions of this Section, then that provision of the lease or other rental agreement is void and unenforceable.