There are obviously two phases for legislation. One is getting something passed and the other is having a commission in place. I think it takes a little longer sometimes to put the organization into place, to find the expertise, and to ensure the appropriate leadership. I would suspect further consultation on the legislation, etc., is likely to take you six months to a year.
I'm sure you are better placed to know about those political realities than I am, but I can say from my experience in helping to organize various places that it does take six months to a year to recruit the appropriate people, to determine what your organizational plan is, to ensure with government that you are really clear on the mandate, and to actually have people in place so that the right signals can be sent. I would say probably a year and a half to two years.