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(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.
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(b) It is unlawful to install, transport or operate a traffic signal preemption device in a motor vehicle, unless-
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(1) the motor vehicle is an emergency vehicle as defined in section 495a of this chapter, and
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(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.
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(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.
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(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.