N.J. Stat. Ann. § 2A:66-1

When a proceeding in lieu of prerogative writ is instituted to review any assessment or other order or proceeding concerning any local or public improvement, founded on any omission or defect in the record of the assessment, order or proceeding which, in the opinion of the court, may be supplied by a new or supplemental certificate of the commissioners who made the assessment or the person who made the record, the court on application of any party or on its own motion, before such cause shall be finally determined, may order the commissioners, or other person, to certify to the court concerning such omission or defect.