California Code, Vehicle Code - VEH § 14609

(a) Every person renting a motor vehicle to another person shall keep a record of the registration number of the motor vehicle rented, the name and address of the person to whom the vehicle is rented, his or her driver's license number, the jurisdiction that issued the driver's license, and the expiration date of the driver's license.

(b) If the person renting the vehicle is a nondriver pursuant to subdivision (c) of Section 14608, the record maintained pursuant to this section shall include the name and address of the person renting the vehicle and, if applicable, his or her identification card number, the jurisdiction that issued the identification card, and the expiration date of the identification card.  The record shall also include the name and address of the licensed driver, his or her driver's license number, and the expiration date of his or her driver's license.