(Parallel cases in statutory interpretation would be the reading in of jurisdictional limitations, or other sorts of limitations on generality, that weren't expressly stated but were clearly intended as part of the content of what was expressly stated.)
If this sort of sentence is actually required to understand how to pretend to be elves, the game needs to be taken out and shot.

I'm going to guess, though, that this sentence isn't required. Which is to say that you're overdoing it. While we sometimes try to dissect the literal logical meaning of rules text, we ought to stop and remember that the authors are not usually lawyers. They intend the game to be used by average Joes and Janes. Using modern law examples to understand the game is probably inappropriate - the usual player has never been involved in "reading of jurisdictional limitations", so that is probably not the way to go.