N.J. Stat. Ann. § 13:17-56

The commission may by resolution provide that the owner of any land upon which any assessments for any improvement shall have been made may pay such assessments in such equal yearly installments, for such number of years as may be provided by rules and regulations of the commission, with legal interest thereon, and at such time and in each year as the commission shall determine under the requirements and conditions for local improvements pursuant to Revised Statutes 40:56-35, provided that any person assessed may pay the whole of any assessment, or any balance of installments, with accrued interest thereon, at one time. If any such installment becomes due and is not paid the whole assessment or balance due thereon shall become and be immediately due, shall draw interest at the rate of 6% and be collected in the same manner as is provided in this act for other past due assessments.