The refuge is large amounts of at least moderately inhabitable land, with minimal militia or violence threat. I used to like NZ as well, but I'm favoring Canada these days, it has an obscenely immense amount of territory to disappear into. Chile, Peru and Argentina are also interesting; while they vary in terms of being basket cases, there's a lot of land, they're far away from all the super powers, are unlikely to get directly nuked, and are not land locked.
I seem to recall Canada either is debating or already has similar legislation in place (memory fails me sadly). Although we do definitely have lots of wide open space, mainly because it's either arctic desert, bare rock, or is below freezing for six months of the year (or more)
