Cal. Veh. Code § 22511.85
A vehicle, identified with a special license plate issued pursuant to Section 5007 or a distinguishing placard issued pursuant to Section 22511.55 or 22511.59, which is equipped with a lift, ramp, or assistive equipment that is used for the loading and unloading of a person with a disability may park in not more than two adjacent stalls or spaces on a street or highway or in a public or private off-street parking facility if the equipment has been or will be used for loading or unloading a person with a disability, and if there is no single parking space immediately available on the street or highway or within the facility that is suitable for that purpose, including, but not limited to, when there is not sufficient space to operate a vehicle lift, ramp, or assistive equipment, or there is not sufficient room for a person with a disability to exit the vehicle or maneuver once outside the vehicle.
Ca. Veh. Code § 22511.85