Constitution of the State of Ohio Art. IV, § 23

Laws may be passed to provide that in any county having less than forty thousand population, as determined by the next preceding federal census, the board of county commissioners of such county, by a unanimous vote or ten per cent of the number of electors of such county voting for governor at the next preceding election, by petition, may submit to the electors of such county the question of providing that in such county the same person shall serve as judge of the court of common pleas, judge of the probate court, judge of the juvenile court, judge of the municipal court, and judge of the county court, or of two or more of such courts.  If a majority of the electors of such county vote in favor of such proposition, one person shall thereafter be elected to serve in such capacities, but this shall not affect the right of any judge then in office from continuing in office until the end of the term for which he was elected.

Elections may be had in the same manner to discontinue or change the practice of having one person serve in the capacity of judge of more than one court when once adopted.