N.J. Stat. § 39:4-203.1
Any defendant convicted of a traffic offense pursuant to Title 39 of the Revised Statutes or a parking offense, shall, upon a satisfactory showing of a condition of indigency or participation in a government-based income maintenance program, be permitted by the court to pay the fine in installments. The court shall set the amount and frequency of each installment. In addition, the court may waive an unpaid portion, up to $200, of any court-imposed time-payment order, as a result of a conviction for a motor vehicle traffic violation or a parking offense, except for a violation of R.S. 39:4-50 or section 2 of P.L. 1981, c.512 (C.39:4-50.4a), for a defendant who is indigent or is participating in a government-based income maintenance program and who has demonstrated an inability to comply with the time-payment order, and in lieu of the remaining unpaid amount, require the defendant to perform community service for a period of time to be determined by the court, or participate in any program authorized by law, or satisfy any other aspect of a sentence imposed. For the purposes of this section, the guideline for the court to determine indigency is an income up to 250 percent of the poverty level, as defined in section 4 of P.L. 2005, c. 156(C.30:4J-11).
N.J.S. § 39:4-203.1