N.J. Stat. § 39:3-71
Every motor vehicle shall have rear view mirrors so located and angled as to give the driver adequate rear view vision. Every passenger automobile manufactured after January 1, 1965 and registered in this State, shall be equipped with an interior mirror and an exterior mirror on the driver's side. On and after January 1, 1965, every commercial motor vehicle registered in this State, other than a trailer or semitrailer, shall be equipped with an interior mirror and an exterior mirror on the driver's side, except that every such vehicle so constructed or loaded as to obstruct or obscure a rear view from an interior mirror shall, in lieu of an interior mirror, be equipped with an exterior mirror on the side of the vehicle opposite the driver's side. The director may by regulation establish other mirror requirements for special or unusual types of vehicles. Any person operating a motor vehicle without the equipment prescribed by this section shall, on conviction, be fined as provided in Revised Statutes 39:3-79.
N.J.S. § 39:3-71