Not being from NZ, I don't feel it's my place to comment on this legislation or speculate on its effectiveness in that country. Too many variables for me. But,

Not being from NZ, I don't feel it's my place to comment on this legislation or speculate on its effectiveness in that country. Too many variables for me. But, I think this is a very intriguing way to construct a prohibition. I'm very aware that trying to regulate away vices in my country (the U.S.) has a spotty history at best. If people want it, they're going to get it, and the alternative black market and its attendant criminality is often worse than the initial problem. But, this is a new wrinkle that (I assume) is also aware of that phenomena and is trying to mitigate it. I'm very, very interested in seeing how this plays out. Obviously, hoping for the best!