N.J. Stat. § 39:3-54.22
An active member of a county volunteer Office of Emergency Management shall submit an application for a permit to the County Emergency Management Coordinator prior to displaying an emergency warning light or lights pursuant to the provisions of this act. The coordinator shall approve the application if the volunteer's official duties require him to respond to fire or emergency calls. The completed application shall be forwarded to the Director of the Board of Chosen Freeholders or other appropriate authority of the county that recognizes and serves the applicant's Office of Emergency Management. Upon approval, the mayor or chief executive officer shall forward the application to the Chief Administrator of the New Jersey Motor Vehicle Commission for issuance of the permit
N.J.S. § 39:3-54.22