Ohio Rev. Code Ann. § 4927.12
(C) In addition to the requirements of division (B) of this section, all of the following apply to any upward alteration of rates for basic local exchange service made under that division:
(1) If the incumbent local exchange carrier, within twelve months prior to the effective date of this section, increased the carrier's rates for basic local exchange service for an exchange area, both of the following apply:
(3)