Originally Posted by PNW_Steve
Be aware that laws vary by state. The above may be correct in Georgia but not in WA. Here, if it is registered as a bus and has a gvrw over 26k you must have a CDL.
Best to verify the rules in your own state.
Actually, I'm betting WA has something similar to a Class A/Class B non-CDL as many other states do (I know GA does). Probably an endorsement for air brakes too.
Some of you might wonder why non-CDL's are a thing, if they aren't required for RV's. WA may require the appropriate class of license for the weight/size of the vehicle (basically, no RV exemption), where in GA there is an exemption. For "everyone else", it covers all sorts of non-commercial usage of larger vehicles - trailering your car/horses to the races, hauling (your) farm produce to the market, a contractor hauling waste from job sites to the dump, etc.