—while currently one year is the standard. It was in 2005 and in that set of reforms, if I'm not mistaken, that it was made possible to extend that period to two years in cases of a serious personal injury offence.
With the high-risk designation, for an individual who is found to be high risk, it can be extended to three years. It can also still be just the one year, so it's a discretionary review period that can be extended. It could be one year longer, but the requirement is that the decision-maker has to be of the view that there is not likely going to be a substantial change in the person's mental condition in that period of time. Otherwise, it stays on a shorter review cycle.
Even if it is set to three years it can be on consent, which sometimes happens. In the event that there is significant improvement within the review period, there is an ability for the parties to request a hearing at an earlier date if that's deemed to be necessary.