New Jersey Statutes Title 2A. Administration of Civil and Criminal Justice 2A § 34-12

Whenever the court shall have acquired jurisdiction of any action under the provisions of this chapter or P.L.2006, c. 103 (C.37:1-28 et al.), the defendant therein may, by counterclaim, state any cause of action under this chapter or P.L.2006, c. 103 (C.37:1-28 et al.) which exists at the time of the service of the counterclaim.