New Zealand isn't the only country that has a review function like this; the United Kingdom and other countries do as well. I was recently reading their 2014 review, and the author of their review report commented on the need for reviews where potential conflicts between State powers and civil liberties are acute but information is tightly rationed, and I completely agree. I also think that periodic reviews are needed because of the nature of the risk itself that terrorism presents to society, but also that we need timely reviews because of the nature of our changing world, and I'm often struck by the demands we place on legislation to cover, what can be, the unforeseeable. I think we've seen an example of that over the last year.