California Code, Vehicle Code - VEH § 11713.6

(a) It is unlawful and a violation of this code for the holder of any dealer's license issued under this article to fail to disclose in writing to the buyer or lessee of a new motor vehicle, that the vehicle, as equipped, may not be operated on a highway signed for the requirement of tire chains if the owner's manual or other material provided by the manufacturer states that the vehicle, as equipped, may not be operated with tire chains.

(b) The disclosure required under subdivision (a) shall meet both of the following requirements:

(c) Prior to the sale or lease, the dealer shall present the disclosure statement for the buyer's or lessee's signature and then shall provide the buyer or lessee with a copy of the signed disclosure.