So on another post the following link has been posted:

https://www.airnzagent.com/covid-19-...ibility-policy

The language for refund eligibility for flights before 31 March is subtlety different, in that it states customers affected by government imposed travel restrictions, rather than flights affected. It also gives agents a “blanket authority” code for use in processing the refund.

Full text below:

Flexibility on International tickets for travel between 5-31 March 2020

For all customers regardless of ticketed date affected by a Government imposed COVID-19 travel restriction, for travel up to and including Tuesday 31 March 2020:

• Request a full refund with no penalty including any associated products such as prepaid baggage, seating.
• Any previous change costs (change penalty, additional collection) are also refundable.
• Change fee is waived and the below applies to additional collection:
  • If travelling on an Air New Zealand aircraft, they may change their travel to the same destination without additional collection regardless of the booking class available. Travel must be in the same cabin. If the same cabin is not available then fare difference applies.
  • Travel booked on other airlines must be booked in the correct / original same booking class.
• Tickets that are currently held in credit under existing flexibility policy within this category are also eligible for the refund.

Blanket authority - AUTHNZA153504 to be entered as an OSI for all refunds for travel prior to Mar 31, 2020
Select ‘Refund/change due to coronavirus’ in the endorsements box