Ohio Rev. Code Ann. § 519.22

Where the people of any township or part thereof have approved county rural zoning regulations in accordance with sections 303.02 to 303.25, inclusive, of the Revised Code, prior to the adoption of a zoning resolution by the board of township trustees, and the township plan includes an area covered by the county rural zoning plan, the zoning resolution adopted by the board of county commissioners shall take precedence over the zoning resolution adopted by the board of township trustees, unless a majority of the voters in such zoned area of the township voting on the issue have voted to have the county rural zoning plan replaced with the township plan of zoning.