Ohio Rev. Code § 4765.111
Except as provided in this section or sections 4765.112 to 4765.116 of the Revised Code, the state board of emergency medical, fire, and transportation services shall conduct disciplinary proceedings regarding the holder of a certificate issued under this chapter in accordance with rules adopted by the board under section 4765.11 of the Revised Code.
The board and a holder of a certificate are the parties to a hearing conducted under this chapter. Either party may submit a written request to the other party for a list of witnesses and copies of documents intended to be introduced at the hearing. The request shall be in writing and shall be served not less than thirty-seven days prior to the commencement of the hearing, unless the hearing officer or presiding board member grants an extension of time to make the request. Not later than thirty days before the hearing, the responding party shall provide the requested list of witnesses and copies of documents to the requesting party, unless the hearing officer or presiding board member grants an extension of time to provide the list and copies.
Failure to timely provide a list or copies requested in accordance with this section shall result in exclusion from the hearing of the witnesses, testimony, or documents.
R.C. § 4765.111