Question About Racing Wheels

That's a pretty sweet wheel right? Wouldn't you want something like that in your sports car? I would but I have to ask some questions first.

What is the legality of having a non-airbag wheel on a road going vehicle? What if you want to have a dual purpose track and road cruising vehicle? Is a wheel without an air bag as safe supposing you have proper racing harnesses?

What the hell does one do for that situation?