Ohio Const. art. XVI, § 2

Whenever two-thirds of the members elected to each branch of the General Assembly shall think it necessary to call a convention, to revise, amend, or change this constitution, they shall recommend to the electors to vote on a separate ballot without party designation of any kind at the next election for members to the general assembly, for or against a convention; and if a majority of all the electors, voting for and against the calling of a convention, shall have voted for a convention, the General Assembly shall, at their next session, provide, by law, for calling the same. Candidates for members of the constitutional convention shall be nominated by nominating petitions only and shall be voted for upon one independent and separate ballot without any emblem or party designation whatever. The convention shall consist of as many members as the House of Representatives, who shall be chosen as provided by law, and shall meet within three months after their election, for the purpose, aforesaid. Effective: January 1, 1913