It isn't unusual. In fact, it's probably more often the case that once the notice is given, the member who gave the notice can act on it at any time.
The issue is to give everybody proper time to prepare. Once you're given that proper time--and I've sat on notices myself for weeks--it's in the system, notice has been given, and obligations have been met on giving colleagues notice. But the reality is that because he gave it, there's no formalization, as Mr. Fast has referred to it; there's no process to formalize the fact that it's going to be on the agenda today.
It was given in due process, and he can act on that notice any time. He can act on it next Thursday; he can act on it in September. It's in the system, it's been given, and you know it's coming. The obligation is on the part of colleagues to be prepared for whenever that happens. The point I'm making is that it's not going to be any more formal than that in the future.