Ohio Rev. Code § 4121.22
Sections 4101.01 to 4101.16 and 4121.01 to 4121.29 of the Revised Code do not deprive the legislative authority of any municipal corporation or any board of trustees or officer of any municipal corporation of any power or jurisdiction over or relative to any place of employment, provided that whenever the bureau of workers' compensation, by an order, fixes a standard of safety or any hygienic condition for employments or places of employment, the order shall, upon the filing by the bureau of a copy thereof with the clerk of the municipal corporation to which it applies, be held to amend or modify any similar conflicting local order in any particular matters governed by the order. Thereafter, no local officer shall make or enforce any order to the contrary.
Any person affected by any local order in conflict with an order of the bureau may petition the bureau for a hearing on the ground that the local order is unreasonable and in conflict with the order of the bureau. The petition for hearing shall conform to the requirements set forth for a petition in section 4121.23 of the Revised Code.
Upon receipt of the petition, the bureau shall order a hearing to consider and determine the issues raised by the appeal, which hearing shall be held in the municipal corporation where the local order appealed from was made. Notice of the time and place of the hearing shall be given to the petitioner and such other persons as the bureau finds directly interested in the decision, including the clerk of the village or the mayor of the municipal corporation from which the appeal came.
If upon investigation the bureau finds that the local order appealed from is unreasonable and in conflict with the order of the bureau, the bureau may modify its order and shall substitute for the local order appealed from such order as is reasonable and legal in the premises, and thereafter the local order, in such particulars, is void.
R.C. §4121.22