N.J. Stat. § 2A:24-6
When more than 1 arbitrator is agreed upon, all the arbitrators shall sit at the hearing of the case, unless by written consent, all parties agree to a lesser number.
The arbitrator so sitting or an attorney of record in the arbitration proceeding may require the attendance of any person as a witness and, in a proper case, to bring with him any book or written instrument. The fees for the attendance shall be those allowed witnesses in a civil action in the Superior Court.
An arbitrator, or where more than one arbitrator is sitting, a majority of them, or an attorney of record in the arbitration proceeding, may issue a subpena. The subpena shall issue in the name of the arbitrator. The subpena shall be signed by an arbitrator, or a majority of them, or an attorney of record, as the case may be. The subpena shall be directed to the person therein named and served in the same manner as a subpena to testify before the Superior Court. If any person so subpenaed to testify shall refuse or neglect to obey such subpena, the court, upon motion, may compel his attendance before the arbitrator or punish him for contempt in the manner provided for the attendance of witnesses or their punishment in the Superior Court.
N.J.S. § 2A:24-6