I always thought that a jeep was considered a truck in the highway act and therefore did not require a rear bumper as some trucks come without rear bumpers, rollpans like steve said.
But I could be wrong.
And as we all know the cops may still pull you over and give you a ticket, then you have to spend money fighting it, So it would probably be cheaper just to get a bumper, Or those funny little Bumperettes :lol: