N.J. Stat. § 39:3-26.1
Any self-propelled vehicle or vehicles which are used or intended to be used solely upon the private property of one person, and which would otherwise be required to be registered under this title in order to operate upon a public highway, may be allowed, subject to the provisions of this act, to cross a public highway for the purpose of gaining access from one portion of private property to another, without the necessity of complying with the registration requirements of this title, upon issuance of a crossing permit by the chief administrator and subject to compliance with the terms and conditions of the permit.
Nothing in this section shall be construed to prevent or prohibit the registration of any self-propelled sprayer pursuant to the provisions of section 6 of P.L. 2015, c. 292(C.39:3-24.5).
N.J.S. § 39:3-26.1