N.J. Stat. § 34:13A-23
All aspects of assignment to, retention in, dismissal from, and any terms and conditions of employment concerning extracurricular activities shall be deemed mandatory subjects for collective negotiations between an employer and the majority representative of the employees in a collective bargaining unit, except that the establishment of qualifications for such positions shall not constitute a mandatory subject for negotiations. If the negotiated selection procedures fail to produce a qualified candidate from within the district the employer may employ from outside the district any qualified person who holds an appropriate New Jersey teaching certificate. If the employer is unable to employ a qualified person from outside of the district, the employer may assign a qualified teaching staff member from within the district.
N.J.S. § 34:13A-23