N.J. Stat. Ann. § 2A:158-9

In the absence of the attorney general and of the county prosecutor, at any session of the Superior Court, the Assignment Judge of the Superior Court may appoint a fit person to prosecute the pleas of the State during that session. The person so appointed, on taking the oath or affirmation prescribed by N.J.S.2A:158-3, shall be vested, during such session, with the powers of a prosecutor, and be entitled to the same compensation and subject to the same penalties.