Ohio Rev. Code § 3517.06
A list of the names and addresses of the members and officers of the county central committee and the county executive committee of each political party shall be filed by the secretary of each committee in the office of the board of elections of the county in which such committee exists and in the office of the secretary of state promptly after the organization of each of such committees. A list of the names and addresses of the members of the state central committee and the state executive committee of each political party shall be filed by the secretary of each committee in the office of the secretary of state promptly after the organization of each of such committees.
All changes occurring in the membership of a county central or executive committee after such filing shall be reported promptly by the secretary of such committee to the board and to the secretary of state. All changes occurring in the membership of a state central or executive committee after such filing shall be reported promptly by the secretary of such committee to the secretary of state. All such lists shall be open to public inspection at all times when the offices in which they are filed are open for business.
R.C. §3517.06