This was debated, and it's the same threshold that was used in P.E.I. and in Ontario for their electoral reform referendums.
The issue was that legislators felt it shouldn't be something that was decided by the urban core; it should have widespread support across the province, and it needed a so-called super-majority because it was such a significant shift in public policy with regard to how the democratic process worked and how representation was going to work in terms of translating votes into seats. So there has been lots of debate in British Columbia about whether that's appropriate. There were numerous suggestions that we've made far more important decisions in this country on the basis of 50% plus one vote and that's all we need.
So it's one of the things we leave to legislators to decide.