Ohio Revised Code Title XLIX. Public Utilities § 4909.421

(A) If the proceeding on an application filed with the public utilities commission under section 4909.18 of the Revised Code by an electric light, natural gas, water-works, or sewage disposal system company requesting an increase on any rate, rate mechanism, joint rate, toll, classification, charge, or rental or requesting a change in a regulation or practice affecting the same has not been concluded and an opinion and order entered pursuant to section 4909.19 of the Revised Code at the expiration of two hundred seventy-five days from the date of the filing of the application, the company may request a temporary increase, and any party to the proceeding may request a temporary decrease, which shall go into effect and remain in effect until modified in accordance with the commission's order based upon the merits of the application.

(B) Not later than three hundred sixty days from the date of filing the application as established by section 4909.193 of the Revised Code, the commission shall issue an order to approve, deny, or modify an application filed under section 4909.18 of the Revised Code.  If the commission does not issue an order within three hundred sixty days after the date of filing of the application, the application shall be deemed approved by operation of law.  A temporary increase or decrease under this section shall not exceed the midpoint of the rates recommended in the staff report filed pursuant to section 4909.19 of the Revised Code and shall be subject to reconciliation and refund.

(C) Nothing in this section shall be construed to mitigate any duty of the commission to issue a final order under section 4909.19 of the Revised Code.