Cal. Pen. Code § 537c
Every owner, manager, proprietor, or other person, having the management, charge or control of any livery stable, feed or boarding stable, and every person pasturing stock, who shall receive and take into his possession, charge, care or control, any horse, mare, or other animal, or any buggy, or other vehicle, belonging to any other person, to be by him kept, fed, or cared for, and who, while said horse, mare or other animal or buggy or other vehicle, is thus in his possession, charge, care or under his control, as aforesaid, shall drive, ride or use, or knowingly permit or allow any person other than the owner or other person entitled so to do, to drive, ride, or otherwise use the same, without the consent or permission of the owner thereof, or other person charged with the care, control or possession of such property, shall be guilty of a misdemeanor.
Ca. Pen. Code § 537c