Ohio Rev. Code Ann. § 4905.302
(A)
(1) For the purpose of this section, the term "purchased gas adjustment clause" means:
(C)
(2) The commission shall not require that a management or performance audit pertaining to the purchased gas adjustment clause of a gas or natural gas company, or a hearing related to such an audit, be conducted more frequently than once every three years. Any such management or performance audit and any such hearing shall be strictly limited to the gas or natural gas company's gas or natural gas production and purchasing policies. No such management or performance audit and no such hearing shall extend in scope beyond matters that are necessary to determine the following:
(3) Unless otherwise ordered by the commission for good cause shown and except as provided in division (D) of this section: