Here is a better look at those exhaust ports, though its hard to tell whether or not they are fake. Any ideas as to what those lights are on the rear bumper? I'm guessing they are just temporary to prevent showing off the shape/design of the production lamps.
I don't know of any law that requires lighting in those areas.
My guess is its to throw people off. I could be wrong, maybe the road rules in certain areas actually require this. We'll never know.