Ann: Trading Halt, page-56

See the ASIC rules regarding buy backs, particularly the "selective buy back" option.
https://asic.gov.au/for-business/running-a-company/shares/share-buy-backs/
A selective buyback would need to be passed by motion at extra ordinary meeting or AGM (last two years this has been in December).
Imo, due to time constraints, this option is unlikely due to the fact that the escrowed shares' release is imminent.
Note also the limits on % of shares to be bought back and also high low prices paid.

What is this 30% limit you keep mentioning?
Takeover laws limit holdings to 20% so 19.9% is really the limit.
https://www.minterellison.com/articles/summary-of-australian-takeover-laws

I suspect the news will be good and aimed at trying to stem the sp decent but im not sure we will see the end of Pangea yet.