California Code
CHAPTER 2 - Formation and Construction of Lease Contract
Section 10206.

10206. (a) 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.

(b) 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.

(Amended by Stats. 1991, Ch. 111, Sec. 10. Effective July 15, 1991.)