[jlhawn]

In the U.S., there are 3 classes of e-bike: Class 1: pedal-assist only up to 20mph (helmets optional for adults) Class 2: same as Class 1 but with optional throttle to 20mph Class 3: pedal-assist only up to 28mph (helmets required, adults only)

There's also a maximum power rating of 750 watts for all of these. I'm not sure where the "pedal by wire" feature is from a regulatory perspective, but to me this fits into either class 2 or 3 depending on what option you get.

[SoftTalker]

My state doesn't even require helmets for motorcyclists. I am guessing any regulations on e-bikes date back to the days when 2-stroke "moped" bikes were briefly popular.