There are a number of resources regarding government and travel restrictions. We've outlined them for you here.
Last updated 31 May 2021 at 11.39AM NZT

Negative Covid test: Most passengers travelling to New Zealand need to provide evidence of a negative COVID-19 test result before departure. Customers transiting through New Zealand from the United Kingdom and the United States must also meet this requirement. There are some quarantine-free flights that don't require a negative COVID-19 test. Learn more. Learn more.

Quarantine in New Zealand: Some passengers arriving into New Zealand must register for managed isolation accommodation before they can be permitted to board their flight. Proof of a managed isolation booking will need to be presented at check-in. Learn more.