Alberta's UCP now appears to be moving forward with a plan to adopt a recall law, though it may table the legislation for the fall term. This comes after UCP MLA Mark Smith introduced a private members' recall bill for the Alberta Legislature.
Smith had previously introduced the bill in 2016 as a Wildrose MLA. The recall proposal would oust the MLA if petitioners get 40% of eligible voters signatures in a 60 day period. There is a long grace period -- 18 months after a general election and 6 months before.
This article notes that Alberta had a recall law in the 1930s, passed by the Social Credit government in 1936 (needing 66.6% of voter signatures), though the law was repealed in 1937 when a campaign was expected to work against Premier William Aberhart's Okotos-High River. There have been 8 attempts to add a recall law since 1993. More on that here.