I know, but the book is merely a compilation of previous Speakers' rulings. It's not that the book gets an independent authority, unless the book accidentally contains an error and therefore is being cited based on an erroneous assumption of about what was said by previous Speakers. I mean, the idea that ties are a part of modern business dress for men is something that may be a declining convention. That would be the argument presented by a number of our colleagues—including, for example, Mr. Housefather—and they might well be right. We have seen an evolution. The best evolution I can think of, or demonstration of this, is our attitude towards having your head covered in the House. At one time, that was not permitted. Then the moment came when a member who had gone through chemotherapy rose to speak with a head covering. There was universal recognition at that moment that something was changing when the Speaker recognized that individual.
So there is a way of doing it. I would suggest that if you can get widespread consensus informally and then have the Speaker recognize somebody and nobody comments on it, you are effectively demonstrating a change. But it requires a widespread consensus. Alternatively, one can simply get a standing order change that actually defines this. A statute always trumps an understanding.