That is why I am trying to inform you of the rules. If you have an encounter with a power trip trooper you know what to say. If he still will not back down you can always insist on speeking with a supervisor.
Quote from the Mn CDL book....
You must have a commercial driverís license (CDL) to operate any of the following commercial motor vehicles (CMV) in Minnesota: A combination of vehicles in which the gross combination weight (GCW) is more than 26,000 pounds and the towed unit has a gross vehicle weight (GVW)* of more than 10,000 pounds.
Besides getting a CDL is not easy for everyone and the cost is high for someone that may use it once every couple of months.