CHAPTER 12-900. PARKING REGULATIONS AND PENALTIES
§12-915. Unattended Motor Vehicle. 
(1) No person driving or in charge of a motor vehicle shall permit the
vehicle to stand unattended without placing the gear shift lever in a position
which under the circumstances impedes the movement of the vehicle, stopping the
engine, locking the ignition in vehicles so equipped, removing the key from the
ignition and, when standing upon any grade, turning the front wheels to the curb
or side of the highway and effectively setting the brake.