This is a confusing subject that comes up every so often....I think it keeps coming up because it is confusing....terminology in the different states are different as well as the regs. This thread had come as close as any I've seen to boiling it all down.....good work guys. Of course the thrust of it pertained to Calif. I'm sure there's gonna be differences in the other states and provinces. This is just operator licensing....if you want to open an unsolvable thread, take on the different requirements for licensing the trailer itself and then taking it through the country.......YIKES