In this section, “sound amplification system” means a compact disc player, a radio, a tape player, or a similar device. This section does not apply to: Authorized emergency vehicles; Vehicles operated by communications, electric, gas, or water utilities; A sound amplification system operated to request assistance or to warn of a hazardous situation; or Unless otherwise prohibited by local law, a sound amplification system used for advertising, parades, or for political or other special events. When a motor vehicle is being operated on a highway, the driver of the vehicle may not operate or permit the operation of a sound amplification system from the vehicle that can be heard outside the vehicle from 50 or more feet. A violation of this section is not considered a moving violation for purposes of § 16–402 of this article.