Ohio Rev. Code Ann. § 4582.05

The area of jurisdiction of a port authority created in accordance with section 4582.02 of the Revised Code shall include all of the territory of the political subdivision or subdivisions creating it, provided that in no case other than as may result from the determination of a port authority under division (C) of section 4582.201 of the Revised Code to change the provisions of Chapter 4582. of the Revised Code that govern its operation, shall the same area be included in more than one port authority.