Section 14604 Of Chapter 4. Violation Of License Provisions From California Vehicle Code >> Division 6. >> Chapter 4.

. (a) No owner of a motor vehicle may knowingly allow another person to drive the vehicle upon a highway unless the owner determines that the person possesses a valid driver's license that authorizes the person to operate the vehicle. For the purposes of this section, an owner is required only to make a reasonable effort or inquiry to determine whether the prospective driver possesses a valid driver's license before allowing him or her to operate the owner's vehicle. An owner is not required to inquire of the department whether the prospective driver possesses a valid driver's license.
  (b) A rental company is deemed to be in compliance with subdivision (a) if the company rents the vehicle in accordance with Sections 14608 and 14609.