Ohio Rev. Code § 303.11
If the zoning resolution is adopted by the board of county commissioners, such board shall cause the question of whether or not the proposed plan of zoning shall be put into effect to be submitted to the electors residing in the unincorporated area of the county included in the proposed plan of zoning for their approval or rejection at the next primary or general election, or a special election may be called for this purpose. Such resolution shall be filed with the board of elections not later than four p.m. on the ninetieth day before the day of the election. No zoning regulations shall be put into effect in any township, unless a majority of the vote cast on the issue in that township is in favor of the proposed plan of zoning. Upon certification by the board of elections the resolution shall take immediate effect in all townships which voted approval, eliminating from the plan any township which did not vote approval.
Within five working days after the resolution's effective date, the board of county commissioners shall file it, including text and maps, in the office of the county recorder. The board shall also file duplicates of the same documents with the regional or county planning commission, if one exists, within the same period.
The board shall file all resolutions, including text and maps, that are in effect on January 1, 1992, in the office of the county recorder within thirty working days after that date. The board shall also file duplicates of the same documents with the regional or county planning commission, if one exists, within the same period.
The failure to file a resolution, or any text and maps, or duplicates of any of these documents, with the office of the county recorder or the county or regional planning commission as required by this section does not invalidate the resolution and is not grounds for an appeal of any decision of the board of zoning appeals.
R.C. § 303.11