My NYS dealer asked repeatedly before installing the front plate mount on my BRZ, so the dealer is apparently not obligated by law. The mount did, of course, come with the car. You need one by law, you will get tickets if you don't have one, and any attempt to move it elsewhere is going to look worse. Maybe I'm in the minority, but I don't think the factory-mounted front plate looks bad at all; I have no problem with it whatsoever. I have much more important things to worry about in my life than where the front plate goes on my car.
And, the car drives as well with it mounted as not..... and that's why I bought it.