A good example of this is in the auto industry. All cars today must be constructed with certain features, like seatbelts and a third brake light. But if you have, say a 48 Studibaker that has neither of these, it is still considered road worthy, because it was constructed before the new features were required by law.
To make such assumtions without first having a working knowledge of how laws work is foolish.
One other thing, if you dont want to see any new laws concerning restricting roller coasters, vote Republican or Libritarian, and stay away from the Democrats. The Democrats are avocates of big government and laws that restrict what you can and cant do (not to mention high taxes).
Well, that is your mini lesson in law and government for today