Although driving legal is critical the most scary thing about this whole darn issue is that if you are involved in an accident with your rig I've learned that the insurance adjusters will weigh the respective vehicles, check the class of your licence and if there is a discrepancy the insurance is null and void. I have documentation concerning this from State Farm. Could be tres expensive (life altering as it is called by insurance people) if law suits are initiated. My advice, go get your "A" licence....it's not a big deal to get.