N.J. Stat. § 40:68-43
For the purpose of aiding a district in the accomplishment of any of the purposes or powers provided for in this article and in marketing any of its bonds, refunding or other, the municipality in which it is situate may pursuant to ordinance duly adopted by its governing body in the manner provided for adoption of a bond ordinance as provided in the Local Bond Law (N.J.S.A. Title 40A:2 et seq.) and with or without consideration and upon such terms and conditions as may be agreed to by and between the municipality and the district unconditionally guarantee the punctual payment of the principal of and interest on any bonds of the district. Any guaranty of bonds of a district made pursuant to this section shall be evidenced by indorsement thereof or such bonds executed in the name of the municipality and on its behalf by such officer thereof as may be designated in the ordinance authorizing such guaranty and such municipality shall thereupon and thereafter be obligated to pay the principal of and interest on such bonds in the same manner and to the same extent as in the case of bonds issued by it. The principal amount of bonds so guaranteed shall after their issuance be included in the gross debt of such municipality for the purpose of determining the indebtedness of such municipality under or in pursuant to the Local Law.
N.J.S. § 40:68-43