Cal. Veh. Code § 6150

In any criminal proceeding in which ownership, possession, or use of a motor vehicle is an issue, a copy certified by the department as its record of title on file, or with the official custodian of those documents of another state, shall be admissible as evidence of ownership of the motor vehicle. Upon the introduction of evidence that the legal owner of a motor vehicle is not named in the certificate of title or that use or possession was with the consent or authority of the owner, a reasonable continuance shall be granted any party to enable the owner of the vehicle to be brought into court to testify.