You still don't get it. You, and others in this thread, are trying to make it much more complicated than it really is. Either it's legal, or it's not. There is no grey area. There is no in-between. It's very simple. I believe it was Scotty who once said "The more they overthink the plumbing, the easier it is to stop up the drain." ... In other words, you're overthinking it, or trying to overcomplicate it, and I'm rather curious as to why you would feel the need to do such a thing.