N.J. Stat. § 18A:6-4.3
All applications shall, in the first instance, be made to the chief of police of the municipality in which the institution is located, except that where the municipality does not have an organized full time police department or where the institution is located within more than one municipality, application shall be made to the Superintendent of State Police. The chief of police or the superintendent, as the case may be, shall investigate and determine the character, competency, integrity and fitness of the person or persons designated in the application. If the application is approved by the chief of police or the superintendent, the approved application shall be returned to the institution which shall issue a commission to the person appointed, a copy of which shall be filed in the office of the superintendent and with the chief of police of the municipality or municipalities in which such institution is located.
N.J.S. § 18A:6-4.3