Ohio Rev. Code § 4503.61: Duties of registrar as to international registration plan.

(A) In accordance with Chapter 119. of the Revised Code, the registrar of motor vehicles shall adopt rules for the apportioned registration of fleets of vehicles under the international registration plan. The registrar shall apply for membership in the international registration plan and shall enter into or make any agreements, contracts, arrangements, or declarations necessary to carry out sections 4503.60 to 4503.66 of the Revised Code.

(B) A vehicle duly registered under the international registration plan in this state or in any other jurisdiction for which this state has received an apportioned registration tax or fee, or which is otherwise operating in accordance with the provisions of the international registration plan, shall be deemed fully registered in this state and may engage in both interstate and intrastate operations.

Nothing in this section exempts vehicles registered in this state from any tax imposed under Chapter 4504. of the Revised Code.