I think if your safety chains are properly rated and attached securely in a conventional manner, and all other aspects of the hitching system are proper, you'll be just fine.
If anyone is going to write you a ticket for something, they'll be looking for anything that looks unsafe or out of the ordinary.
Attaching your safety chains the far right and left ends of the bumper and/or trailer, would definitely look out of the ordinary. Plus, the chains would have to be rediculously long and dragging the ground to be able to make a turn...
One thing about laws-
There's the SPIRIT of the law, which is to make us more safe. Then there is the actual WORDING of the law, which is often written by someone who has no knowledge of the subject, and that is where the confusion starts!