At the time of application for transfer, the registrar shall compute and collect the amount of tax due on the succeeding motor vehicle, based upon the amount that would be due on a new registration as of the date on which the transfer is made less a credit for the unused portion of the original registration beginning on that date. If the credit exceeds the amount of tax due on the new registration, no refund shall be made. In computing the amount of tax due and credits to be allowed under this division, the provisions of division (B)(1)(a) and (b) of section 4503.11 of the Revised Code shall apply. As to passenger cars, noncommercial vehicles, motor homes, and motorcycles, transfers within or between these classes of motor vehicles only shall be allowed. If the succeeding motor vehicle is of a different class than the motor vehicle for which the registration originally was issued, new license plates also shall be issued upon the surrender of the license plates originally issued and payment of the fees provided in divisions (C) and (D) of section 4503.10 of the Revised Code.
No commercial car to which a registration is transferred under this division shall be operated on a public road or highway in this state until after the transfer of registration is completed in accordance with this division.
R.C. § 4503.12