Ohio Rev. Code § 735.17
The director of public service shall be the platting commissioner of the city, and shall provide regulations governing the platting of all lands to require all streets and alleys to be the proper width and coterminous with adjoining streets and alleys.
Whenever the legislative authority of such city deems it expedient to plat any portion of the territory within the city in which the necessary or convenient streets or alleys have not already been accepted by the city so as to become public streets, or when any person plats any lands within three miles of the city, the commissioner shall, if such plats are in accordance with the rules prescribed by him, endorse his written approval on such plat. The commissioner shall not require any person to alter a plat or any part of it as a condition for approval, as long as the plat is in accordance with the platting regulations provided for in this section in effect at the time the plat was submitted. No plat of such land is entitled to record in the office of the county recorder without such written approval so endorsed thereon. The approval of the platting commissioner of a city shall not be required, unless such city is the nearest to the land sought to be allotted.
R.C. §735.17