[kumarvvr]

There is no specific regulation, other than selling incomplete products as completed products.

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.

[gruez]

How's this any different than the situation with PC parts? You have CPU and GPU manufacturers advertising their products with images of games being played, yet you need to buy half a dozen other parts before you can start gaming.

[blackoil]

Its other way round, you can sell CPU / steering only, but you can't say you are selling a PC/Car without it.