Ohio Rev. Code § 4563.08
In order to define and determine the airport hazard area in which airport zoning shall be applicable, the office of aviation, upon request of any airport zoning commission appointed pursuant to section 4563.05 of the Revised Code, shall formulate and adopt, and may revise when necessary, an airport approach plan for any airport within its jurisdiction. Each plan shall indicate the airport hazard area, the circumstances under which structures, objects of natural growth, public highways, and certain uses of land would be airport hazards, and the height limits of structures and objects of natural growth, and what other restrictions should be contained in the airport zoning regulations. In adopting or revising the plan, the office shall consider, among other things, the size, type, and speed of aircraft expected to use the airport, the character of the flying operations expected to be conducted at the airport, the traffic pattern and regulations affecting flying operations at the airport, the location of public highways, the nature of the terrain, the height of existing structures and objects of natural growth above the level of the airport, and the possibility of lowering or removing existing obstructions. The office may obtain and consider information from and the opinion of any agency of the federal government charged with the promotion, regulation, or control of civil aeronautics as to the approaches necessary to safe flying operations at the airport.
R.C. §4563.08