22.04.380   Unlawful riding and towing.
   No person shall:
   (a)   While driving a motor vehicle, knowingly permit any person to ride on such vehicle or upon any portion thereof not designed or intended for the use of passengers; or
   (b)   At any time, ride on any moving vehicle or upon any portion thereof, not designed or intended for the use of passengers.
(Ord. 4368 § 2 (part), 1996)