Its not in the text but its a motorcycle at this point, subject to the same regulations.
I have seen it in the sport bike community. Fender eliminator kits and tiny tail ligjts with integrated turn signals are not legal. Both for lack of indicator seperation and lack of DOT certificaton. A DOT certified light/signal will have a DOT stamp moulded into lens. Any officer that wants to pull you over or tow you knows this, and will use it as a last resort if he wishes.
Of course these are extreme cases, but ive witnessed it myself, and been pulled iver myself for this.
All UlIm saying is, in the strictest interpretation, DOT equipment will be required, just like every motorcycle/scooter.