It shall be unlawful for any person, firm, corporation, or concern to operate or permit to be operated any vehicle propelled by any type of combustible engine or motor, including motorcycles and scooters, without a muffler of standard make and model, functioning in the manner in which it was designed to function by the manufacturer thereof, so as to minimize noise from the operation of the engine or motor.
(Ord. 560.1, passed 5-29-64) Penalty, see § 71.99