I haven't dealt with this myself either, but would guess there are some 'uses' that might dictate how, where, why, to perfect. That is is it commercial transport, passenger, novelty, display, etc. I would then ask the related regulating authority.
I almost wonder if it is like a plane where you go through the FAA,,,??? only the federal DOT instead or something of that nature. Good luck, and for my own curiosity, please keep us posted.