I think the point of confusion is that as written, it sounds like an official law post with enforceable regulations, when actually, it's just an overambitious claim. That itself is fine of course, it's nothing if not natural for Houses (or anyone) to make overambitious claims they can't enforce.
But to be clear, Bretonia cannot enforce laws outside of Bretonia House Space and Dublin.
And houses cannot enforce laws except those written in the Laws of Sirius thread, which require a Player Request to change. Anything outside of that thread is just RP fluff.