N.J. Stat. § 4:7-35
For the purpose of making the inspections, examinations and investigations specified in sections 4:7-15 to 4:7-34 of this title, and to enforce the provisions of the same, the department by its authorized officers or agents may enter upon any lands, open or inclosed, upon which such inspections, examinations and investigations are necessary or where any nuisance as defined in section 4:7-16 of this title is maintained or charged, and into any storehouse or building containing nursery stock which the department is directed or entitled to inspect.
Any interference with or obstruction made to any such officer or agent while engaged in the performance of the duties imposed by sections 4:7-15 to 4:7-34 of this title, shall subject the offender to punishment as a disorderly person under the general laws of this state upon a charge made against him by the officer interfered with.
N.J.S. § 4:7-35