Ohio Rev. Code § 3513.122
Political parties shall be eligible to elect delegates and alternates to national conventions or conferences of their respective political parties, other than conventions provided for in section 3513.12 of the Revised Code, if they notify the secretary of state that they will elect such delegates. Such notification must be made prior to the one hundred fifth day before the day of the primary election which occurs in any year at which national convention or conference delegates and alternates are elected.
Petitions of candidacy for such delegates shall be filed in the form and manner provided by the secretary of state.
Any political party electing delegates to a national convention or conference under this section in an odd-numbered year in which a statewide primary election is not otherwise required shall pay all expenses of that election.
R.C. § 3513.122