N.J. Stat. § 18A:24-27
Within 60 days after such submission to it, the local finance board shall cause its consent to be endorsed upon such copy, if it shall be satisfied, and shall record by resolution, its estimates that the amounts to be expended for the new educational facilities to be financed pursuant to such ordinance or proposal are not unreasonable or exorbitant, and that issuance of the bonds, proposed to be authorized by such ordinance or proposal, will not materially impair the credit of any municipality comprised within the district or substantially reduce its ability, during the ensuing 10 years, to pay punctually the principal and interest of its debts and supply essential public improvements and services and that said issue of bonds cannot lawfully be authorized in compliance with the provisions of sections 18A:24-19 and 18A:24-21, and that, taking into consideration trends in population, in value and uses of property, and in needs for educational facilities, the net school debt of such district will, at some date within 20 years, as stated in the supplemental debt statements which might be filed on such date, be less than the percentage of equalized valuation of taxable property in such district as provided in section 18A:24-19, but if the local finance board is not so satisfied it shall cause its disapproval to be endorsed on such copy within said period of 60 days.
N.J.S. § 18A:24-27