I'm trying to find out how this all works but I've been told that once the crossover games with CAS have been played, then there will be a semi and final for ISA teams only (and I dont know if this is for all grades or just the As). Whether the crossover games points will be used to tally who plays who i cant work out. I suspect not - so if that's the case, the finishing order after this Saturday will determine the ISA semi finalists.
It's all a bit up in the air at the moment and to be honest, given that this is year one of this new format, I suspect there will be issues but it will be intriguing nonetheless.