N.J. Stat. § 40:37A-93
If there is a question whether a labor organization represents a majority of employees in the appropriate unit such question shall be submitted by either the county improvement authority operating the public transportation facility or the labor organization to an election conducted under the auspices of the New Jersey State Board of Mediation, which shall have authority to conduct such an election and to certify the result thereof. If there is a question as to whether the proposed unit is appropriate, that matter shall be referred to arbitration as hereinafter set forth. In determining the unit or units appropriate for the purposes of collective bargaining, the arbitrator shall be guided by the standards developed under the Federal labor laws in determining unit questions and applied to comparable industries.
N.J.S. § 40:37A-93