N.J. Stat. § 24:3-1
The State department and the local board, and any officer or employee thereof, in the performance of any duty imposed by this subtitle, shall have full access to any premises or place, container or conveyance used in the production, preparation, manufacture, packing, storage, transportation, handling, distribution or sale of any food, drug, cosmetic or device, and may inspect any of the aforesaid premises, places or conveyances to determine if it meets the sanitary requirements set forth in this subtitle, and may examine and open any package or container which is believed to contain any food, drug, cosmetic or device manufactured, sold, exposed for sale or had in possession with intent to sell in violation of any provision of this subtitle and inspect the contents thereof and take therefrom samples for analysis, whether or not the container or package be sealed or locked and whether or not it be in transit.
N.J.S. § 24:3-1