18 U.S.C. § 39 — Traffic signal preemption transmitters

(a) Offenses: (1) Sale — knowingly selling a traffic signal preemption transmitter to a "nonqualifying user," in or affecting interstate or foreign commerce, is punishable by a fine under this title, imprisonment of not more than 1 year, or both. (2) Use — a nonqualifying user who, in or affecting interstate or foreign commerce, makes unauthorized use of a traffic signal preemption transmitter is punishable by a fine under this title, imprisonment of not more than 6 months, or both. (b) Definitions: A "traffic signal preemption transmitter" means any mechanism that can change or alter a traffic signal's phase time or sequence. A "nonqualifying user" means a person who uses such a transmitter and is not acting on behalf of a public agency or private corporation authorized by law to provide fire protection, law enforcement, emergency medical services, transit services, maintenance, or other services for a federal, State, or local government entity. It does not include a person using the transmitter for classroom or instructional purposes.