Use and Installation of Anti-theft Alarm Devices on Motor Vehicles and Trailers

Anti-theft devices which have sirens as a means of sounding an alarm may be used on motor vehicles or trailers registered or operated within the Commonwealth, provided that no siren may be mounted on the outside of any motor vehicle or trailer or otherwise used except in accordance with the provisions of M.G.L. c. 90, §§ 16 and 7I.