In answer to the questions, there is this list on the official NZ Covid-19 webpage.
Update
Even if your business is a totally home-based one, you won’t be able to use couriers to transport goods to customers, unless it is deemed to be an essential one: a message from one courier company, Aramex, is below. Thus if you are into selling products rather than services, you’ll be able to take orders but not use couriers for delivery for the next 4 weeks. This seems extreme to us as in the past they were always able to provide a very good service to everybody.
But as far as we know, you can still use the Waikanae Post Office.
Due to the rapidly evolving COVID-19 situation, the New Zealand government has announced their plan to move to a critical Level 4 status effective midnight Wednesday 25 March.
With this announcement comes a set of newly enforced regulations around businesses classified as essential and non-essential services.
At this stage, the New Zealand Transport sector is considered an essential service and a critical link to providing pick-up and delivery services throughout the country.
Although Aramex New Zealand will continue to operate business as usual, we are now required to abide by this new set of guidelines by limiting collections to essential services only until advised otherwise.
With expected high volumes within our network, we anticipate that there may be some disruptions to our service. Please be assured that we are doing our best to manage and minimise the impact this may have.