Sec. 10-1.5 Public beaches.
(a) No person shall operate, park, or store or otherwise exert control over any unauthorized motor vehicle on any public beach with the exception of areas specifically designed to accommodate motor vehicles such as paved roads for boat launchings.
(b) For purposes of this section, the following definitions shall apply:
"Motor vehicle" means and includes automobiles, trucks, dune buggies, motorcycles, mopeds, motor scooters or any other vehicles which are mechanically propelled.
"Public beach" means and includes all beach areas owned or controlled by city, State of Hawaii or United States of America seaward of the highest wash of the waves as evidenced by the line of vegetation.