Iowa Constitution Art. X, § 3. Constitutional convention

At the general election to be held in the year one thousand nine hundred and seventy, and in each tenth year thereafter, and also at such times as the general assembly may, by law, provide, the question, “Shall there be a convention to revise the constitution, and propose amendment or amendments to same?” shall be decided by the electors qualified to vote for members of the general assembly; and in case a majority of the electors so qualified, voting at such election, for and against such proposition, shall decide in favor of a convention for such purpose, the general assembly, at its next session, shall provide by law for the election of delegates to such convention, and for submitting the results of said convention to the people, in such manner and at such time as the general assembly shall provide; and if the people shall approve and ratify such amendment or amendments, by a majority of the electors qualified to vote for members of the general assembly, voting thereon, such amendment or amendments shall become a part of the constitution of this state. If two or more amendments shall be submitted at the same time, they shall be submitted in such a manner that electors may vote for or against each such amendment separately.