Unless otherwise permitted by law, no person shall operate or permit operation of a sound amplification device, including, but not limited to, radios, stereos, loudspeakers and sirens, in or from any vehicle, in such a manner that sound emitting therefrom can be heard outside of the vehicle from a distance of fifty (50) or more feet when the vehicle is being operated or is parked upon a public street, alley, or private property open to the public, unless the system is being operated to request assistance or warn of a hazardous situation. This section shall not apply to: a) employees or agents of governmental entities engaged in the course of their employment, including, but not limited to, police, fire and ambulance personnel, and b) sound systems used for parades or special events unless said use is otherwise prohibited by law. (Ord. 173 § 1, 2001)