It shall be unlawful for any person to operate any motor of a motor vehicle of a weight in excess of four tons (8,000 pounds) for a consecutive period longer than two minutes which operation will raise the noise level above the ambient noise level of the neighborhood by more than six decibels, between the hours of 9:30 p.m. and 7:00 a.m., or on Sundays or holidays.
   This section shall not apply to buses operated for the transportation of passengers while standing in established bus terminals, bus turnarounds, bus parking lots and bus storage yards.
(Ord. 103-82.  Passed 9-7-82.)