Ohio Revised Code Title I. State Government § 163.32

Any removal of an advertising device that is ordered by a public agency pursuant to law or ordinance, or to the exercise of any power or authority possessed by the public agency, shall be deemed to constitute the taking of all right, title, and interest in the advertising device, including any leasehold interest, of the owner of the advertising device and of the right of the owner of the real property on which the advertising device is located to erect and maintain the advertising device on it. If the public agency and any such owner of a compensable right, title, or interest do not reach agreement as to the amount of just compensation to be paid for the right, title, or interest, the public agency shall institute an action to appropriate it in accordance with this chapter.