All of Alberta was ceded to the crown through the numbered treaties prior to the establishment of the province. Are you implying that there’s something about treaty 8 that makes it different from treaty 4, 6, 7, and 10?
It’s all ceded territory, and assuming an independent Alberta retains the crown why would it present any issue?
> Indians DO HEREBY CEDE, RELEASE, SURRENDER AND YIELD UP to the Government of the Dominion of Canada, for Her Majesty the Queen and Her successors for ever, all their rights, titles and privileges whatsoever, to the lands included within the following limits, that is to say:
Even if Alberta became a republic or joined the US, its secession after all, a moment when old agreements which by their original text promising a fresh suit of clothes to each chief every 3 years and $5 per year to every band member are up for even more re-evaluation than they have already been subject to.