Ohio Rev. Code § 3313.03: Redistricting into subdistricts.

Within three months after the official announcement of the result of each successive federal census, the board of education of each city school district which, according to such census, has a population of fifty thousand or more but less than one hundred fifty thousand persons and which elected to have subdistricts shall redistrict such districts into subdistricts. Such subdistricts shall be bounded as far as practicable by corporation lines, streets, alleys, avenues, public grounds, canals, watercourses, ward boundaries, voting precinct boundaries, or present school district boundaries, shall be as nearly equal in population as possible, and be composed of adjacent and as compact territory as practicable. If the board of any such district fails to district or redistrict such city school district, then the director of education and workforce shall forthwith district or redistrict such city school district, subject to sections 3313.01 to 3313.13 of the Revised Code.