Ohio Revised Code Title XLIX. Public Utilities § 4927.124

(A) An incumbent local exchange carrier altering its rates for basic local exchange service under section 4927.12, 4927.121, or 4927.122 of the Revised Code shall provide not less than thirty days' notice to the public utilities commission and to affected customers.

(B) Division (A) of this section also applies to an incumbent local exchange carrier altering its rates for basic local exchange service in an exchange area for which the carrier has been granted an exemption under section 4927.123 of the Revised Code.