Arrival formalities for visiting yachts can be found at this link.
http://www.customs.govt.nz/VisitingCraft/default.htm

New Zealand Customs Service
Marine Section, Box 29, Auckland, New Zealand
Fel  +64 9 307 6516
Fax +64 9 307 6720
Email yachts@customs.govt.nz

On arrival, a Customs officer will provide all yachts and small craft with a New Zealand Border Agencies Information pack Arrival of Yachts and Small Craft. This provides information on arrival and departure requirements, the forms that require completion, and additional information from the New Zealand Customs Service, the Ministry of Agriculture and Fishery, the New Zealand Immigration Service and the Maritime Safety Authority of New Zealand.

Client Hospitality Service

We know the difficulties that can be associated with arriving at a new port and the time it takes to get to know the area. So, to make this as care free as possible we provide a dedicated person to assist with all your non-technical requirements such as accommodation, transportation, and familiarization of the fabulous region and country you are about to visit for all crew and owners.