N.J. Stat. § 11A:6-10
A leave of absence with pay shall be given to employees who are duly authorized representatives of an employee organization defined as a "representative" in subsection e. of section 3 of P.L. 1941, c.100 (C.34:13A-3) and affiliated with the New Jersey Policemen's Benevolent Association, Inc., Fraternal Order of Police, Firemen's Mutual Benevolent Association, Inc. or the Professional Fire Fighters Association of New Jersey to attend any State or national convention of the organization, provided, however, that no more than 10 percent of the employee organization's membership shall be permitted such a leave of absence with pay, except that no less than two and no more than 10 authorized representatives shall be entitled to such leave, unless more than 10 authorized representatives are permitted such a leave of absence pursuant to a collective bargaining agreement negotiated by the employer and the representatives of the employee organization, and for employee organizations with more than 5,000 members, a maximum of 25 authorized representatives shall be entitled to such leave. The leave of absence shall be for a period inclusive of the duration of the convention with a reasonable time allowed for travel to and from the convention, provided that such leave shall be for no more than seven days. A certificate of attendance at the convention shall, upon request, be submitted by the representative so attending.
N.J.S. § 11A:6-10