You should check with the Ohio Bureau of Motor Vehicles (BMV) for the penalty for driving with expired registration / commercial license tags or if you were cited for this offense than check with the OH the court listed on the ticket.
We can tell you that it appears failing to show a valid certificate of registration for a commercial vehicle falls under Ohio Revised Code (ORC) 4549.18. Here it states:
The operator of a "commercial car," as defined in section 4501.01 of the Revised Code, when the commercial car is required to be registered under the Revised Code, shall, when operating the commercial car, trailer, or semitrailer on the streets, roads, or highways of this state, display inside or on the vehicle the certificate of registration for the commercial car, trailer, or semitrailer provided for in section 4503.19 of the Revised Code, or shall carry the certificate on the operator's person and display it upon the demand of any state highway patrol trooper or other peace officer.
Every person operating a commercial car, trailer, or semitrailer required to be registered under the Revised Code shall permit the inspection of the certificate of registration upon demand of the superintendent or any member of the state highway patrol or other peace officer of this state.
(B) Whoever violates division (A) of this section is guilty of a commercial car certificate of registration violation, a minor misdemeanor.
ORC 2935.26 subsection (E) notes that each court shall establish a fine schedule that shall list the fine for each minor misdemeanor, and state the court costs. The fine schedule shall be prominently posted in the place where minor misdemeanor fines are paid. From fine schedules we have read says the maximum fine is usually $150 for a minor misdemeanor.
If you were cited for the offense of driving with expired commercial tags (registration) in Ohio you should contact the court to find out more about the penalties you may be facing. It may help you if you go to a BMV office and renew your registration before your court date.
Follow this link for a commercial vehicle insurance quote.