Housing and Regeneration Bill

I am not in any way suggesting that it necessarily will fail. The noble Baroness was obviously a superb head of whatever she was doing and she achieved her objectives. All I am asking is: what is the legal consequence of something written down in the Bill as ““thou shalt”” when someone comes along and does not? I am not in any way implying that it is going to fail or making a criticism of anyone. I am merely asking what seems to me to be a question, although I may be the only one interested in the answer .