Conn. Gen. Stat. § 33-1076: Other quorum or voting requirement.

(a) The certificate of incorporation may provide for a greater voting requirement for members, or classes of members, than is provided for sections 33-1000 to 33-1290, inclusive. The certificate of incorporation or the bylaws may provide for a greater quorum requirement for members, or classes of members, than is provided by sections 33-1000 to 33-1290, inclusive.

(b) The certificate of incorporation may, except where expressly prohibited by sections 33-1000 to 33-1290, inclusive, or where such action is required by said sections to be unanimous, provide for a lesser voting requirement, but unless expressly permitted by a particular section of said sections, not less than a majority of the votes cast by the members, or by the members of a particular class, entitled to vote on the matter.

(c) An amendment to the certificate of incorporation that adds, changes or deletes a greater quorum or voting requirement must meet the same quorum requirement and be adopted by the same vote and classes required to take action under the quorum and voting requirements then in effect or proposed to be adopted, whichever is greater.