This is from the NCDOT web site. Notice the second part of the sentence. And I quote: " provided the GVWR...OR... vehicles beign towed is in excess of 10,000#."
License Eligibility / Requirements
There are three classes of vehicles that require a North Carolina Commercial Driver License (CDL):
Commercial Class A - Any combination of vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, provided the GVWR of the vehicle or vehicles being towed is in excess of 10,000 pounds.
NCDOT Division of Motor Vehicles: License Eligibility / Requirements
NC classifies a Commercial Class A as a CDL. Yes, it is confusing. The CDL Class A license still requries you to pass the CDL written test and driving test. You do not need haz mat certification if you are not dealing with that type of material. I'm not sure what type of testing is required for the B & C license.
I've known several individuals that have gotten ticketed for towing 10,000# trailer withiout the appropriate CDL (Class A).