Ohio Rev. Code Ann. § 5124.109
(C) The department shall notify a provider of the findings of an audit of a cost report by issuing an audit report. The department shall issue the audit report not later than three years after the earlier of the following:
(E)
(1) The department shall establish an audit manual and program for field audits conducted under this section. Each auditor conducting a field audit under this section shall follow the audit manual and program, regardless of whether the auditor is under contract with the department, works for a firm under contract with the department, or is employed by the department. The manual and program shall do both of the following:
(a) Require each field audit to be conducted by an auditor to whom all of the following apply:
(b) Require each auditor conducting a field audit to do all of the following: