Ohio Rev. Code § 731.19: Subject and amendment of bylaws, ordinances, and resolutions.

No ordinance, resolution, or bylaw shall contain more than one subject, which shall be clearly expressed in its title. No bylaw or ordinance, or section thereof, shall be revived or amended, unless the new bylaw or ordinance contains the entire bylaw, ordinance, or section revived or amended, and the bylaw, ordinance, or section so amended shall be repealed. Each such bylaw, resolution, and ordinance shall be adopted or passed by a separate vote of the legislative authority of a municipal corporation and the yeas and nays shall be entered upon the journal.