The United States suspends ANZUS obligations to New Zealand
After consultations with Australia and after negotiations with New Zealand broke down, the United States announced that it was suspending its treaty obligations to New Zealand until United States Navy ships were re-admitted to New Zealand ports, citing that New Zealand was "a friend, but not an ally". The crisis made front-page headlines for weeks in many American newspapers, while many American cabinet members were quoted as expressing a deep sense of betrayal.However, David Lange did not withdraw New Zealand from ANZUS, although his government's policy led to the US's decision to suspend its treaty obligations to New Zealand.
An opinion poll in New Zealand in 1991showed 54% of those sampled preferred to let the treaty lapse rather than accept visits again by nuclear-armed or nuclear-powered vessels. The policy did not become law until 8 June 1987 with the passing of the
New Zealand Nuclear Free Zone, Disarmament, and Arms Control Act 1987, more than two years after the
Buchanan was refused entry after the USA refused to declare the presence or absence of nuclear weapons, and a year after the USA suspended its treaty obligations to New Zealand.
from wikipedia