Official document explaining NZ self isolation (dated 12 March 2020 and likely to be amended to include all visitors/returning people very shortly):
https://www.health.govt.nz/our-work/...self-isolation
”Self-isolation means staying away from situations where you could infect other people. This means any situation where you may come in close contact with others (face to face contact closer than 1 metre for more than 15 minutes), such as social gatherings, work, school, child care/pre-school centres, university, polytechnic and other education providers, faith-based gatherings, aged care and health care facilities, prisons, sports gatherings, restaurants and all public gatherings.
If you are a visitor to New Zealand, this means you should avoid sitting in a restaurant, or participating in any type of tour group.”