Conn. Gen. Stat. § 7-233g
Any municipal cooperative 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 appropriate public official of the governing body of each of its members and may thereupon cause to be published in a newspaper or newspapers published or circulating in the area of operation a notice stating the fact and date of such adoption and the places where such bond resolution has been so filed for public inspection and also the date of the first publication of such 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 twenty days after the first publication of such notice. If any such notice shall at any time be published and if no action or proceeding questioning the validity or proper authorization of bonds provided for by the bond resolution referred to in said notice, or the validity of any covenants, agreements or contracts provided for by said bond resolution shall be commenced or instituted within twenty days after the first publication of said notice, then all residents and taxpayers and owners of property in the area of operation and users of the project 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 or proper authorization of such bonds, or the validity of any such covenants, agreements or contracts, and said bonds, covenants, agreements and contracts shall be conclusively deemed to be valid and binding obligations in accordance with their terms and tenor.
Conn. Gen. Stat. § 7-233g
(P.A. 75-634, S. 7, 24.)