N.J. Stat. § 40A:66-12
The municipal shared services energy authority may cause a copy of any bond resolution adopted by it to be filed for public inspection in its office and in the office of the clerk of the governing body of each member municipality, and may thereupon cause to be published, in a newspaper published or circulating in each member's community, a notice stating the fact and date of this adoption and the places where the bond resolution has been filed for public inspection, the date of the first publication of the notice, and that any action or proceeding in any court questioning the validity or proper authorization of bonds provided for by the bond resolution, or the validity of any covenants, agreements, or contract provided for by the bond resolution, shall be commenced within 20 days after the first publication of the notice. If the notice shall at any time be published and if no action or proceeding questioning the validity of the establishment of the municipal shared services energy authority or the validity or proper authorization of bonds provided for by the bond resolution referred to in the notice, or the validity of any covenants, agreements, or contract provided for by the bond resolution shall be commenced or instituted within 20 days after the first publication of the notice, then all residents and taxpayers and owners of property in each of the member municipalities, and all other persons whatsoever, shall be forever barred and foreclosed from instituting or commencing any action or proceeding in any court, or from pleading any defense to any action or proceedings, questioning the validity of the establishment of the municipal shared services energy authority, the validity or proper authorization of the bonds, or the validity of the covenants, agreements, or contracts, and the municipal shared services energy authority shall be conclusively deemed to have been validly established and to be authorized to transact business and exercise powers as an authority pursuant to P.L. 2015, c. 129(C.40A:66-1 et al.), and the bonds, covenants, agreements, and contracts shall be conclusively deemed to be valid and binding obligations in accordance with their terms and tenor.
N.J.S. § 40A:66-12