Ann: Successful A$30M Two Tranche Placement to Fast Track Growth, page-111

'relevant period' is a rolling target - you do the calculation for the 12 months prior to when the shares will be issued, so 31/1/24 - 30/5/25.
7.1 capacity (the 15%) can also be refreshed by shareholder approval - so for example the whole Oct-24 placement doesn't eat into 7.1 capacity because they were approved by shareholders at the AGM.

I expect you'll see them load up approvals into the meeting to refresh their 7.1 capacity for everything: Both tranches of placement, the Gold crane placement, Nebari if it's req'd.

I think your interpretation of the 10% is right.