N.J. Stat. Ann. § 2A:17-56.72

6. Nothing in P.L.2015, c.223 (C.2A:17-56.67 et seq.) shall be construed to prevent a parent who is responsible for paying child support from petitioning the court for the termination of child support for good cause prior to the child reaching 19 years of age, or from petitioning the court to contest the extension of child support for a child beyond the date the child reaches 19 years of age, as provided in P.L.2015, c.223 (C.2A:17-56.67 et seq.).