implementation

The hardest thing here is that there are already numerous 'invisible' people in New Zealand, if you implement such a system - it will no doubt go in at first as a voluntary system (as is the case with the DNA database) and of cause if it's voluntary, then those who wish to avoid detection will not opt in.

The best thing to do is to start doing it now for new borns, and new people into the country, as well as enforcing it to Residents who wish to travel via aeroplane (even domestic) this will meet less general objection by the public thinking they are being forced into it, as only those who wish to use these services will 'require' one at first..... and eventually by the time our generation ages, we can be sure that all below us will already have Identification.