Why was there a regulation in place preventing this in the first place? I don’t get it.
Not that those are insurmountable obstacles, but a law that says "You can't claim your vehicle does 200 miles on a charge if it doesn't include a battery" or "You can't claim your vehicle is safe in a frontal crash because the battery absorbs some of the energy except you're not including the battery" don't seem unreasonable.
So this probably adds exceptions specifically for battery-less EVs to still get a VIN and be sold as a complete vehicle.
Viewing this from a US perspective anyways...
For example, its perfectly legal to advertise a car as saying its a car without engine. You just cannot advertise it in such a way that the viewer thinks he can buy the car and just enjoy it.