New Jersey Statutes Title 54. Taxation 54 § 39-146

a. The director, upon presenting appropriate credentials may conduct inspections and remove samples of fuel to determine the coloration of diesel fuel and kerosene, or to identify shipping paper violations at any place where fuel is or may be produced, stored or loaded into fuel transportation vehicles. Inspections shall be performed in a reasonable manner consistent with the circumstances, but in no event is prior notice required. Inspectors may physically inspect, examine or otherwise search any tank, reservoir, or other container that can or might be used for the production, storage, or transportation of fuel. Inspections may be made of any equipment used for, or in connection with, the production, storage, or transportation of fuel. Upon demand by the inspectors all shipping papers, documents and records required to be kept by a person transporting fuel shall be produced for immediate inspection. The places where inspections may occur include, but are not limited to:

b. Inspections to determine violations under P.L.2010, c. 22 (C.54:39-101 et al.) may be conducted by the director, the Chief Administrator of the New Jersey Motor Vehicle Commission, and any other law enforcement officer through procedures established by the director.

c. Inspectors may reasonably detain any person or equipment transporting fuel in or through this State for the purpose of determining whether the person is operating in compliance with the provisions of P.L.2010, c. 22 (C.54:39-101 et al.) and any rules and regulations promulgated pursuant thereto. Detainment may continue for such time only as is necessary to determine whether the person is in compliance with P.L.2010, c. 22 (C.54:39-101 et al.).