Ohio Rev. Code Ann. § 3519.16
(B) The committee interested in a petition shall include upon each part-petition filed with the secretary of state a designation of the county in which the part-petition was circulated and a number for the part-petition. In any county where part-petitions are circulated, each part-petition shall be numbered sequentially. The committee shall sort the part-petitions by county. Upon filing the petition with the secretary of state, the committee also shall file the following: