I cannot see why there is so much confusion to come up with some common laws. Much of the world has; if it can go over 20 mph (25kph) with motor assist, it is considered a motor vehicle and must be registered as such. Not permitted on sidewalks, bike paths and where other motor vehicles are banned. You want to go faster, get your license, insurance and stay off the MUPs. If someone is imprudent enough to ride on a MUP at 30 mph, then they do not deserve to be there. I don't care how safe you believe you are.