Conn. Gen. Stat. § 7-564

(1) In the event the municipality shall fail or refuse to comply with the indenture or agreement with the trustee or shall default in any contract made with the holders of such general obligations, the holders of twenty-five per cent in aggregate principal amounts of such then outstanding obligations, by instrument or instruments filed with the trustee and proved or acknowledged to the satisfaction of the trustee may cause the trustee to take action for the purposes provided for in sections 7-560 to 7-579 , inclusive.

(2) Such trustee may, upon written request of the holders of twenty-five per cent in principal amount of such general obligations then outstanding, in its own name, exercise all or any of the powers of any such holders including: (A) By mandamus or other suit, action or proceeding at law or in equity, enforce all rights of the holders of such general obligations, including requiring the municipality to carry out the provisions of any contract with the holders or any indenture or agreement with the trustee and to perform its duty thereunder; (B) bring suit upon such general obligations; and (C) by action or suit in equity, enjoin any acts or things which may be unlawful or in violation of the rights of the holders of such obligations.

(3) Such trustee shall have and possess all of the powers necessary or appropriate for the exercise of any functions specifically set forth in sections 7-560 to 7-579 , inclusive, or incident to the general representation of the holders of such general obligations of such issue in the enforcement and protection of their rights.

(4) The Superior Court shall have jurisdiction of any suit, action or proceeding by or on behalf of the holders of obligations. The venue of such suit, action or proceeding shall be the judicial district in which such municipality is located.