That's weird that if you aren't a certain age you can't go see a movie. In the US you they're only guidelines up to R and NC-17...in that case you either have to be w/a parent, have parental permission (in some places) or be either 17 or 18 (for R and NC-17 respectively).
It sounds like a cool film, though, so I hope it comes out in the US. I don't see why it wouldn't, but heh...whatever.