Western Provinces can regain Sovereignty using Canada's Constitution Part 1

Canada started as a Confederation of Provinces but quickly became a Federation with overly strong centralized Federal control. Provinces do have the ability to regain much of the sovereignty surrendered once the Supreme Court was established in 1875 but it will take a resolve to reassert Provincial Authorities, Rights & Responsibilities that were unwisely abrogated to Ottawa.

It's not too late to 'fix what's broke'.