I believe he was referring to licensing a car, since the following sentence referred to "simple licensing." > regardless of size or capacity Vehicles of diffe

I believe he was referring to licensing a car, since the following sentence referred to "simple licensing." > regardless of size or capacity Vehicles of different size/capacity do require different qualifications to drive. Certain classes of vehicles require a CDL for their class. See https://driving-tests.org/cdl-classification-licenses/ https://driving-tests.org/cdl-classification-licenses/. You also have to be 21+ in may states to even apply for them in many states.