One does not need to obtain a by-your-leave to ride one. One can just ride – Just like that! There are no taxes applied for riding one, either. Nor to legally ride it – on government-owned roads (styled "public" but the true owner is the one who controls a thing; does the "public" control the roads?). Ear tags and stickers to show who owns the item – as is the case with cars and motorcycles – are not required.
How long do you suppose it will last?
The only reason it has – to date – is because the principle that government owns everything and so controls everything that has already been applied to cars and trucks and motorcycles has not yet been applied to bicycles.