Ohio Rev. Code Ann. § 4511.103
(A) The director of transportation, in accordance with 23 U.S.C. 109(d) and 315, with the provisions of the manual of uniform traffic control devices relating to tourist-oriented directional signs and trailblazer markers, and with Chapter 119. of the Revised Code, shall adopt rules to carry out a program for the placement of tourist-oriented directional signs and trailblazer markers within the rights-of-way of those portions of rural state highways that are not on the interstate system. The rules shall prohibit the placement of tourist-oriented directional signs and trailblazer markers at interchanges on state system expressways and freeways. The rules shall include, but need not be limited to, all of the following:
(C) All direct and indirect costs of the program shall be fully paid by the eligible attractions that participate in the program. The director shall develop a fee schedule for participation in the program, and shall charge each program participant the appropriate fee. Direct and indirect costs include, but are not limited to, the cost of all of the following: