N.J. Stat. Ann. § 4:19-17

The Legislature finds and declares that certain dogs are an increasingly serious and widespread threat to the safety and welfare of citizens of this State by virtue of their unprovoked attacks on, and associated injury to, individuals and other animals; that these attacks are in part attributable to the failure of owners to confine and properly train and control these dogs; that existing laws at the local level inadequately address this problem; and that it is therefore appropriate and necessary to impose a uniform set of State requirements on the owners of vicious or potentially dangerous dogs.