ISO 3166-2:NZ is the entry for New Zealand in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166.
Currently for New Zealand, ISO 3166-2 codes are defined for 16 regions and 1 special island authority
Some of the New Zealand outlying islands that are outside the authority of any regions are not assigned codes, specifically:Kermadec Islands
New Zealand Subantarctic Islands
Three Kings Islands
Each code consists of two parts, separated by a hyphen. The first part is NZ, the ISO 3166-1 alpha-2 code of New Zealand. The second part is three letters: regions and special island authority.
ISO 3166-2:NZ Wikipedia
Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).
ISO 639-1 codes are used to represent subdivision names in the following administrative languages:(en): English
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Regional councils, unitary authorities, and special island authorityNotes
The following changes to the entry have been announced in newsletters by the ISO 3166/MA since the first publication of ISO 3166-2 in 1998: