N.J. Stat. Ann. § 54:29A-53

Taxes heretofore imposed pursuant to any law for the taxation of property used for railroad and canal purposes or hereafter imposed pursuant to this act, or any unpaid portion thereof, shall bear interest from and after the date upon which they became or may become due and delinquent at the rate as provided in the State Tax Uniform Procedure Law, subtitle 9 of Title 54 of the Revised Statutes, notwithstanding the prosecution of any action or proceeding, including a proceeding in lieu of prerogative writ.