Help with Suncorp TSR

I have been reading the Suncorp Notice of Meetings and I'm bit confused how their TSR Broad based group is used or when the companies are declared.

There appears to be two components in the TSR, a broad based and a peer group to work out the remuneration!

I noticed that they have named the 12 peer group companies? I image the these 12 company’s are part of 50 broad based TSR group.

But there is only a general comment about the other 38 companies!

When do they select them?

Is at the time the AGM or whenever they want too, to give them the best outcome.