Back in 2018, Aotearoa was in the midst of the Operation Burnham inquiry. During this, it emerged that key evidence was subject to a US veto under an obscure and secret treaty. Part of the Five Eyes arrangement, this treaty was referred to by a number of different names in different documents, but seemed to be the "Security of Information Agreement between the New Zealand Minister of Defence and the United States Secretary of Defense of September 2 1952", with amending exchanges of notes in November 1961 and in 1982.
I was curious about this treaty and especially about its impact on the handling of OIA requests, so I asked MFAT for a copy. They refused, claiming it was a) secret; and b) American, and therefore couldn't be released. So I went to the Ombudsman, pointing out that the equivalent treaties for all other Five Eyes had been released and were likely to be substantially similar (so it wasn't really secret after all), and that if MFAT wanted to hide behind the Americans, it should at least have to actually ask them if they objected to release. The Ombudsman agreed on the latter point at least, and so MFAT agreed to reconsider its decision and ask the US. And then they just... didn't. back to the Ombudsman, and MFAT agreed that it would make its own assessment of the treaty and consult the US about that, and released a summary. back to the Ombudsman for a full-on challenge to the idea that this is secret or foreign in any way, and MFAT agreed to formally talk to the US to gain US declassification. And then they just... didn't (again). And its currently before the Ombudsman again, with more MFAT promises to talk to the US.
So you can imagine how pissed off I am to find out that a key part of the information I requested - the 1961 exchange of notes - was declassified and released by the US State Department in January 2018, before I even made my request, and that MFAT has simply been dicking me around for seven years. You can read the full thing here, thanks to the Unredacted Five Eyes archive.
As for what it says, it echoes the other, similar (and public) agreements that we already knew about. Which invites the question: why the secrecy? What is the supposed harm in release here? What was the point of MFAT's "consultation" if it didn't result in them learning that this had already been declassified? And why is the New Zealand government still resisting transparency after all these years?