N.J. Stat. § 40A:9-10.4
Notwithstanding any law, rule or regulation to the contrary, a political subdivision of the State, or an agency, authority or instrumentality thereof, that has not adopted the provisions of Title 11A of the New Jersey Statutes, shall not pay supplemental compensation to any officer or employee for accumulated unused sick leave in an amount in excess of $15,000. Supplemental compensation shall be payable only at the time of retirement from a State-administered or locally-administered retirement system based on the leave credited on the date of retirement. This provision shall apply only to officers and employees who commence service with the political subdivision of the State, or the agency, authority or instrumentality thereof, on or after the effective date of P.L. 2010, c. 3. This section shall not be construed to affect the terms in any collective negotiations agreement with a relevant provision in force on that effective date.
N.J.S. § 40A:9-10.4