N.J. Stat. Ann. § 18A:24-58

If funds are not available to pay the principal or interest falling due on any obligation of a type II district, in full or in part, for the reason that no such certified statement or an incorrect statement was transmitted to the county board of taxation, the board of education of the district shall execute and deliver promissory notes for the amount thereof not so certified and pay the amount so borrowed together with interest thereon at a rate not exceeding 6% per annum, and any such amount so borrowed together with interest shall be included in the next ensuing certified statement to the county board of taxation.