From 1 January 2006, children born in New Zealand (or in the Cook Islands, Niue or Tokelau) acquire New Zealand citizenship at birth only if at least one of their parents:
is a New Zealand citizen; or
is entitled to be in New Zealand indefinitely in terms of the Immigration Act 2009 (e.g. has a resident visa, or permanent resident visa or is an Australian citizen or Australian permanent resident); or
is entitled to reside indefinitely in the Cook Islands, Tokelau or Niue.
A child born in New Zealand is a New Zealand citizen by birth if they would otherwise be stateless.