Conn. Gen. Stat. § 53-142a

Any person who makes and sells to anyone other than a new car dealer, licensed under section 14-52 , a person actually engaged in the trade of locksmith, a law enforcement agency or a loan institution which finances the purchase of motor vehicles, any motor vehicle master car key, and any person other than one engaged in the manufacture of such keys as a bona fide business or other than one to whom the sale of such a key is authorized by this section who has such a key in his possession, shall, for a first offense, be guilty of a class D misdemeanor and, for a subsequent offense, be guilty of a class B misdemeanor.