N.J. Stat. § 34:1-69.10

The appointing authority shall appoint a qualified interpreter to assist a hearing impaired person throughout the proceedings and in preparation with counsel as follows: a. In any case before any court or grand jury in which a hearing impaired person is a party, either as a complainant, defendant or witness, or as hearing impaired parent of a juvenile; b. At all stages in any proceeding of a judicial or quasi-judicial nature before any State agency or county or municipal governing body or agency in which a hearing impaired person is a principal party in interest, either as a complainant, defendant, witness or supplicant, or as hearing impaired parent of a juvenile; c. In any proceedings in which a hearing impaired person may be subject to confinement or criminal sanction or in any proceeding preliminary thereto, including a coroner's inquest, grand jury proceedings and proceedings related to mental health commitments. A hearing impaired person who has been arrested and who is otherwise eligible for release shall not be held in custody pending the arrival of an interpreter. (1) When a hearing impaired person is arrested for an alleged violation of a criminal law, a qualified interpreter shall be appointed prior to reading of Miranda warnings, interrogating or taking a statement from the hearing impaired person. (2) Any statement, written or oral, made by a hearing impaired person in reply to a question from a law enforcement officer or any other person having a prosecutorial function in any criminal or quasi-criminal proceeding shall not be used against that hearing impaired person unless either the statement was made or elicited through a qualified interpreter and was made knowingly, voluntarily and intelligently, or the hearing impaired person has requested a waiver pursuant to section 10 of this act and the court makes a finding that any statement made by the hearing impaired person was made knowingly, voluntarily and intelligently. (3) The provisions of this subsection shall not apply to apprehensions, arrests or statements involving a violation of Title 39 of the Revised Statutes (Motor Vehicles and Traffic Regulation). L.1983, c. 564, s. 4, eff. Jan. 17, 1984.