Ohio Rev. Code Ann. § 4506.12
(B) The classes of commercial driver's licenses and the commercial motor vehicles that they authorize the operation of are as follows:
(C) The following endorsements apply to commercial drivers' licenses:
(D) The following restrictions apply to commercial driver's licenses:
(E) In addition to any endorsement that otherwise may apply, a person who is engaged in the towing of a disabled or wrecked motor vehicle shall hold a commercial driver's license bearing any endorsement required to drive the towed vehicle except the driver is not required to have either of the following:
(F) The following endorsements apply to commercial driver's license temporary instruction permits:
(G) The following restrictions apply to commercial driver's license temporary instruction permits:
(J)