There are periodic reviews every six months after the last decision, so it's usually about once a year. One of the judges, Justice Dawson, characterized it as a review that, with the person complying, would be cascading towards more fuller liberty than they started out with. It hasn't worked out that way. The conditions have been relaxed over time, but they are extremely restrictive still.
On March 6th, 2012. See this statement in context.