(...) Perhaps it is related to the number of seats? That would sound reasonable. At home, one can drive a fairly large vehicle with a normal license. But once the number of seats exceed 6 (or something similar), you'll need a special "light bus" (...) (24 years ago, 27-Apr-00, to lugnet.off-topic.geek)
(...) Most places use a weight rating of somewhere around 20000 pounds (the max the vehicle can carry, not the actual weight of the vehicle). If a truck has air brakes, that usually means you need the special license. (...) That is a different (...) (24 years ago, 27-Apr-00, to lugnet.off-topic.geek)
