Notice, these posts from EGoodhue today.

The Prime Minister today mentioned that an epidemic notice will be issued. What this means for current temp visa holders in NZ is that all visas remain valid for the 3 months following the expiration of the epidemic notice.
Section 78 of the Immigration Act 2009:

78 Deemed extension of temporary entry class visa expiring during epidemic
(1) This section applies to a temporary entry class visa held by a person in New Zealand if—
(a) it was current immediately before the commencement of an epidemic management notice; and
(b) but for this section, it would expire before the day that is 14 days after the day on which the notice expires.
(2) The visa must, for all purposes, be treated as if it continues to be a current visa allowing stay in New Zealand until the earlier of the following events:
(a) its cancellation:
(b) the expiration of 3 months after the day on which the epidemic management notice expires.
(3) Subsection (2) does not require—
(a) the endorsement or modification of the visa; or
(b) the issue of a document extending the visa; or
(c) the grant of a new visa.