(a) For purposes of this section, a “traffic signal preemption device” means any device that emits a pulse of light or other signal that, when received by a detector attached to a traffic control signal, changes that traffic control signal.
(b) It is unlawful to install, transport or operate a traffic signal preemption device in a motor vehicle, unless-
(1) the motor vehicle is an emergency vehicle as defined in section 495a of this chapter, and
(2) the traffic signal preemption device is being operated when the driver of the emergency vehicle is giving an audible signal by siren, exhaust whistle or bell and a visual signal by flashing lights.
(c) It is unlawful for a retailer or manufacturer to sell a traffic signal preemption device to any person for any intended use other than in the operation of an emergency vehicle.
(d) Any person convicted of violating subsection (a) or (b) is guilty of a misdemeanor punishable by imprisonment for not more than three months, or by a fine of not less than $250 and not more than $750, or by both such fine and the imprisonment.