(810 ILCS 5/2A-206) (from Ch. 26, par. 2A-206)
    Sec. 2A-206. Offer and acceptance in formation of lease contract.
    (1) Unless otherwise unambiguously indicated by the language or circumstances, an offer to make a lease contract must be construed as inviting acceptance in any manner and by any medium reasonable in the circumstances.
    (2) If the beginning of a requested performance is a reasonable mode of acceptance, an offeror who is not notified of acceptance within a reasonable time may treat the offer as having lapsed before acceptance.
(Source: P.A. 87-493.)