Tod, just did a quick check of the treaty it does actually cover hip and aircraft but only in the Pacfic, technically ANZUS should not be invoked.
I suspect any events of incidents which occur within either the ECS or SCS would be considered to have taken place 'within the Pacific'. The Falklands Islands situation for the UK was quite different with respect to NATO, since there is a very clear declination of what is within areas of NATO concern, and what is not. The line is set at the Tropic of Cancer, which is 23 degrees 26'N of the equator. Side note, if the island of Puerto Rico were to become a US state, that is south of the Tropic of Cancer, so an incident there would not trigger a NATO response. Presumably the same would apply if an incident were to occur in Hawai'i. No clue what the situation would be if something were to occur on the US or Canadian west coasts.
What's the current status of ANZUS in regards to NZ with the thawing of relations over the nuc policy?
ANZUS is still active. AFAIK though the US has suspended its obligations to NZ under the treaty in 1986 following the incident with the USS Buchanan being denied entry in 1985, and then the passage of the New Zealand Nuclear Free Zone, Disarmament, and Arms Control Act 1987. The thawing of naval/military relations of late means that RNZN vessels can make port calls to US ports, but has not led to a resumption of obligations between the two nations. The USN still maintains a policy of neither confirming or denying whether a particular warship is carrying nuclear warheads. As a practical reality, the number and variety of US nuclear weapons has declined since the heights of the Cold War, with nuclear-tipped LWT's and depth bombs having been retired from service IIRC. The US still has obligations to Australia, and the Australian obligations still exist with both the US and NZ, and NZ still has obligations to Australia.
Three sides notes about the above.
When I made the comment about NZ making defence policy decisions at the expense of allies, one of the items I was referring to was the Lange Gov't decision to deny entry to the USS Buchanan, because she had the ability to carry nuclear weapons and the US would not declare that none were aboard. Thirty years after the fact, I cannot help but wonder whether there were subtle links between assets controlled by the Kremlin and elements of the anti-nuclear movement active in NZ in the 70's and 80's. Such a policy (two years before it became law...) would have only impacted three nations, France, the US and and perhaps the UK. Had the gov't of the day had a policy advising/requesting French, USN and RN warships kitted with nuclear weapons not make port calls in NZ, I believe the request would have been honoured (by the USN and RN at least...) and would not have driven a wedge, or potentially driven wedges, between NZ and major allies.
Related to the above and the New Zealand Nuclear Free Zone, Disarmament, and Arms Control Act 1987, I have the sense that the (Lange) gov't of the day wished to restrict the policy options available to future gov'ts with the passage of the Act. That notion, and the fact that it was successful, is worrisome.
The third item relates to the NZ Green Party, which has attempted to expand the Nuclear Free Zone out to cover all of NZ's EEZ. That was defeated by a Labour gov't, with the reasoning being that NZ cannot restrict the free passage of vessels outside of NZ's 12 n mile limit/home waters. Such efforts, plus a past Green defence policy advocating for the adoption of a 'passive non-compliance' doctrine, suggests to me that many of those most heard discussing defence in NZ lack an understanding of realpolitik. The USN could easily have started declaring their warships making NZ port calls did not have nuclear weapons aboard, with no regard to whether they truthfully did or not.
I do not question or dispute the right of NZ to set it's own policy, but the way it went about it, and then the resulting aftermath, has always seemed a bit dodgy to me.