Part C, clause 50something onwards. it was posted on here (might have been Murph, apologies of not), a good few pages back and picked up on.
Hence i've been a bit of a broken record about it. They will Definately know before. How much before, hard to tell, but a couple of hours before is not really apt.
Imho, they were told, when they were told the date. I can't see how Cas could contact any given party and say, weve reached a decision heres the date we will announce it, without telling them the decision, when the mechanism is there for that to happen. Any party or their lawyers would be asking to know it, and there would be no justifiable logic for refusing to tell them. So imho, both have knowm since they have known the date. And both agreed to a date change, so both knew at that point, for me.