N.J. Stat. Ann. § 40A:4-73

Unless a suit, action or proceeding questioning the authorization, sale or execution or otherwise questioning the validity of tax anticipation notes be begun prior to the delivery of such notes, any such notes reciting that they are issued pursuant to this chapter shall, after delivery thereof, be conclusively presumed to be fully authorized by all the laws of this State and to have been sold, executed and delivered by the local unit in conformity therewith. The validity of such notes shall not be questioned by either a party plaintiff or a party defendant, or by the local unit, or any taxpayer thereof, or any other interested party in any court, anything herein or in other statutes to the contrary notwithstanding.