In 1998, the Supreme Court of Canada ruled that any province — including Alberta — has the right to pursue independence if there is a clear majority vote on a clear question. (That’s from the landmark Reference re Secession of Quebec case.)
In response, Parliament passed the Clarity Act in 2000, which confirms the exact same thing: If a majority of Albertans vote to leave, the federal government must negotiate our exit.
No new laws are needed. No legal barriers stand in the way.
We already have the constitutional path laid out.
We just have to choose it.