California Code, Vehicle Code - VEH § 11931

(a) The dealer shall give the purchaser of a new housecar a list of every express warranty, of which he has notice, that has been issued on the housecar, or a part thereof, by the first-stage manufacturer, the second-stage manufacturer, the dealer, or any other party.  The dealer shall also give the purchaser a copy of each warranty.

(b) The purchaser shall sign the list as an acknowledgment that he has received each warranty listed.  The dealer shall sign to signify that all express warranties applicable to the housecar appear on the list.  Both the purchaser and the dealer shall retain a copy of the list.

(c) Violation of this section is an infraction.