N.J. Stat. Ann. § 39:4-56.3

The registration of any motor vehicle which is used by any person in violation of section 1 of this act shall be suspended for not less than 90 days nor more than 1 year unless the owner thereof can demonstrate to the satisfaction of the Director of Motor Vehicles that said vehicle was used in such a manner without his knowledge and consent. In fixing the period of suspension, the director shall give consideration to the threat to public safety and the public inconvenience caused by the use of said vehicle.