Ohio Revised Code Title XLIX. Public Utilities § 4971.16

As used in this section, “incompetent person” means a person who is so mentally impaired, as a result of a mental or physical illness or disability, as a result of an intellectual disability, or as a result of chronic substance abuse, that the person is incapable of taking proper care of the person's self or property or fails to provide for the person's family or other persons for whom the person is charged by law to provide.

Persons in interest who fail to become parties to the agreement within the four-month period referred to in section 4971.14 of the Revised Code are entitled to the same rights, interest, estate, remedy, liens, and action, and none other, which parties in interest of like class and amount who signed the agreement obtained by and under it. If a person in interest fails for six years after the publication of the notice mentioned in such section to apply at the principal office of the company, either in person or by proxy, to become a party in interest in the agreement, such person, unless an infant or incompetent person, shall be barred of all interest, claim, right, or action under the agreement or otherwise. In case of such disability such rights shall be extended for two years after the termination of the disability.