Self, you're correct and it's unfortunate that the NFHS didn't choose more wisely when they wrote the POE. The term "moving screen" should be used to describe a screen that is moving and nothing else. As has already been pointed out, a moving screen is not illegal. Illegal contact when a screenr is moving is a foul.
There are many terms that are not found in the rule book. As long as they accurately describe what has happened, that's fine. But a term such as "over the back," does not accurately describe a pushing foul from behind. Nor does moving screen describe illegal contact during a screen.
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