N.J. Stat. § 40:62-133.5
The commission 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 clerk of the governing body of the municipalities represented in the commission and may thereupon cause to be published in a newspaper published or circulating in the municipalities represented in the commission a notice stating the fact and date of this adoption and the places where the bond resolution has been filed for public inspection and also the date of the first publication of the notice and also that any action or proceeding of any kind or nature 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 no action or proceeding questioning the validity of the creation and establishment of the commission, 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 contracts provided for by the bond resolution is commenced or instituted within 20 days after the first publication of the notice, all residents and taxpayers and owners of property in the municipalities and users of the waterworks system 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 creation and establishment of the commission, or the validity or proper authorization of the bonds, or the validity of the covenants, agreements or contracts, and the commission conclusively is deemed to be validly created and established and is authorized to transact business and exercise powers as a commission under this amendatory and supplementary act, and the bonds, covenants, agreements and contracts conclusively are deemed to be valid and binding obligations in accordance with their terms and tenor.
N.J.S. § 40:62-133.5