Conn. Const. art. thirteenth, § 2

The question “Shall there be a Constitutional Convention to amend or revise the Constitution of the State?” shall be submitted to all the electors of the state at the general election held on the Tuesday after the first Monday in November in the even-numbered year next succeeding the expiration of a period of twenty years from the date of convening of the last convention called to revise or amend the constitution of the state, including the Constitutional Convention of 1965, or next succeeding the expiration of a period of twenty years from the date of submission of such a question to all electors of the state, whichever date shall last occur. If a majority of the electors voting on the question shall signify “yes”, the general assembly shall provide for such convention as provided in Section 3 of this article.