Running discussion on SP, page-54873

I’m less certain the FIRB is applicable here. Correct me please if I have it wrong but isn’t the AVZ resource actually held in a company in which AVZ holds share interest (51% share), which is how AVZ was able to divest 24% of the original 75% share in that company to CATH?

Now if I’m correct there, then in terms of whether any claim about the “Chinese taking over” can actually come about or not - wouldn’t FIRB rules have absolutely no say because the thing being sold is not shares in an Australian company (just some asset of an Australian company like how CATH was able to acquire 24% recently without FIRB approval required)?