I think those come under light vehicle classification, and thus you'd be looking at the laws for small tractors etc. I can't remember what the weight limits on those are though. Quite low, it's just above motor cycles (which have their own licencing quagmire).
Here the regs are pretty restrictive about how big your drone can be without a licence. Something like 400 grams. People skirt it a lot
is it the same for ground drones? i want a rideable (driveable?) robo-dog SO BADLY
I think those come under light vehicle classification, and thus you'd be looking at the laws for small tractors etc. I can't remember what the weight limits on those are though. Quite low, it's just above motor cycles (which have their own licencing quagmire).