The first change in the Citizenship Act came in the 1970s, when the domicile requirement was reduced basically to three years. Bill C-24 extended that. I didn't think it extended it quite long enough. I still would have preferred five years, but I think if you value your citizenship and allow it to other people to apply for, shortening the time period somewhat devalues the concept of citizenship—
On April 14th, 2016. See this statement in context.