(810 ILCS 5/2A-206)
(from Ch. 26, par. 2A-206)
Offer and acceptance in formation of
(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.)