This New Zealand work is in the public domain in New Zealand, because its copyright has expired or it is not subject to copyright (details). According to the New Zealand Copyright Act of 1994 as elaborated on by the Standing Committee on Copyright of the Library and Information Association of New Zealand (LIANZA), as of May 2011:
Type of material
Copyright has expired if ...
A
For photographs, manuscripts, archives, music scores, maps, paintings, and drawings published anonymously, under a pseudonym or the creator is unknown:
photo taken or work published prior to 1 January 1974 (50 years ago)
For photographs, manuscripts, archives, music scores, maps, paintings, and drawings (except A-C)
Creator died before 1 January 1974 (50 years ago)
E
For oral histories, music, computer-generated work and spoken word sound recordings
Released before 1 January 1974 (50 years ago)
F
Published editions2
Released before 1 January 1999 (25 years ago)
1 Some government publications are not subject to copyright, including bills, acts, regulations, court judgments, royal commission and select committee reports, etc. See references [1] or [2] for the full list. 2 means the typographical arrangement and layout of a published work. eg. newsprint.
You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
Note that this work might not be in the public domain in countries that do not apply the rule of the shorter term and have copyright terms longer than life of the author plus 50 years. In particular, Mexico is 100 years, Jamaica is 95 years, Colombia is 80 years, Guatemala and Samoa are 75 years, Switzerland and the United States are 70 years, and Venezuela is 60 years.
The following items shall not be the subject matter of copyright:
The constitution, acts, regulations, or official documents.
Translations or compilations by central or local government agencies of works referred to in the preceding subparagraph.
Slogans and common symbols, terms, formulas, numerical charts, forms, notebooks, or almanacs.
Oral and literary works for news reports that are intended strictly to communicate facts.
Test questions and alternative test questions from all kinds of examinations held pursuant to laws or regulations.
The term "official documents" in the first subparagraph of the preceding paragraph includes proclamations, text of speeches, news releases, and other documents prepared by civil servants in the course of carrying out their duties.
WORKS OF STATE RUN ENTERPRISES ARE NOT AUTOMATICALLY FREE OF COPYRIGHT.