Ohio Rev. Code § 705.04
If, the proposition of adopting a plan of government submitted as provided by sections 705.01 to 705.03, inclusive, of the Revised Code, is approved by a majority of those voting thereon, such plan, together with any of the supplementary propositions approved by a majority of the electors voting thereon, shall be the charter of such municipal corporation. When so adopted, sections 705.01 to 705.92, inclusive, of the Revised Code shall go into effect immediately, insofar as they apply to the nomination and election of officers provided for in such sections, and in all other respects such sections shall go into effect upon the first day of January following the next regular municipal election. All officers of any plan of government superseded by adoption of a plan provided in such sections, except members of the legislative authority, shall continue in office and in the performance of their duties until the legislative authority elected under such sections provides by ordinances for the performance of the duties of such officers, whereupon the terms of all such officers shall expire and their offices be abolished.
R.C. §705.04