Ohio Rev. Code Ann. § 3302.042
(B) Except as provided in division (D), (E), or (F) of this section, if the parents or guardians of at least fifty per cent of the students enrolled in a school to which this section applies, or if the parents or guardians of at least fifty per cent of the total number of students enrolled in that school and the schools of lower grade levels whose students typically matriculate into that school, by the thirty-first day of December of any school year in which the school is subject to this section, sign and file with the school district treasurer a petition requesting the district board of education to implement one of the following reforms in the school, and if the validity and sufficiency of the petition is certified in accordance with division (C) of this section, the board shall implement the requested reform in the next school year:
(D) The district board shall not implement the reform requested by the petitioners in any of the following circumstances:
(4) When all of the following have occurred: