A four-tier alert level restrictions system was in place in during the COVID-19 pandemic in New Zealand between March 2020 and December 2021, with levels 3 and 4 being forms of lockdown. In level 1 there were no restrictions; in level 2 there were limits on gatherings; in level 3 only purposeful travel was allowed and there were strict limits on gatherings; and in level 4 only essential travel was allowed and gatherings were banned.