Ohio Rev. Code § 4503.301
Upon the filing of such application and the payment of an annual fee of five hundred dollars and appropriate postage as required by the registrar of motor vehicles, the registrar shall assign to the applicant a distinctive number and the requested license plates with the number thereon. Such license plates shall be known as "commercial car demonstration license plates," and shall expire on a date prescribed by the registrar. Upon the first application by any person for such license plates, the registrar shall prorate the annual fee in accordance with section 4503.11 of the Revised Code; for all renewals or replacements of such license plates, the registrar shall collect the full amount of the annual fee.
Commercial car demonstration license plates may be displayed on commercial cars, commercial tractors, trailers and semitrailers owned by the manufacturer, dealer, or distributor, when those vehicles are operated by or being demonstrated to a prospective purchaser. In addition to the purposes permitted by section 4503.30 of the Revised Code, the license plates provided for in this section may be displayed on vehicles operated or used for delivery, hauling, transporting, or any other lawful purpose. When such license plates are used, the license plates provided for in section 4503.30 of the Revised Code need not be displayed.
The operator of any commercial car, commercial tractor, trailer, or semitrailer displaying the license plates provided for in this section, at all times, shall carry with the operator a letter from the manufacturer, dealer, or distributor authorizing the use of such manufacturer's, dealer's, or distributor's commercial car demonstration license plates.
When such license plates are used on any commercial car or commercial tractor, such power unit shall be considered duly registered and licensed for the purposes of section 4503.38 of the Revised Code.
R.C. § 4503.301