Lucky you. I am east Coast. Love to have a basement.
Move.
Or as we used to say in the northeast, if you want a cellar, don't build in the swamp...
And, if you don't want water in your basement, don't dig where my grandfather told you not to.
Metal God, I think you missed my point using the muzzle device example. And, you're doing the very easy thing of confusing reality with what satisfies the law.
Nothing made by man is permanent. Everything can be unmade and remade, all that differs is the amount of effort (and cost) needed to do it.
My point about the law is not what you can, or can't do physically, or WHY you need to do it, my point is that some laws specifically state what complies with the law,
When the law lists specific requirements for compliance, then anything not listed is assumed not to comply. Where there is no set requirement in the law only the vague one of "being permanent" then whether or not what you have complies with the law will be decided in court.
And, even if you win, you're out time, and considerable amounts of money.
SO, in this case knowing if the law in NJ has a specific requirement that complies with their idea of "permanent" is reasonably important. Guessing (aka using common sense) and guessing wrong could cost a LOT more than just money. Laws are rarely about common sense, or so it seems these days, but they are always about compliance, and when under their jurisdiction, knowing what is required is actually common sense.