The ASX:FAL $7.75/share party, page-63

sharee-ee, If you were a shareholder in CHN prior to the in-specie distribution you might need to have a look at Chalice Mining's web site.
Under announcements of 9/2/2022 is "ATO Class Ruling - Demerger of Falcon Metals"
Probably the main bit of interest is clause l5 and that states:
"The Commssioner accepts that a reasonable apportionment is to attribute:
98.56% of the total of the cost bases of your Chalice shares just before the demerger to the Chalice shares, and
1.44% of the total of the cost bases of your Chalice shares just before the demerger to the corresponding Falcon shares."

Then there is also mention of choosing demerger roll-over should a CGT event occur. So should you sell your Falcon shares within 12 months of the demerger I think you might be up for a visit to your tax advisor.