Any broadly similar agreement will count, think inclusive criteria rather than exclusive. A key factor would be that any agreement make provision for resettlement of citizens of that country in Australia.
Resolves to 'None' if no pacts have been signed by 2030.
ChatGPT explainer:
Australia has entered into a groundbreaking pact with Tuvalu, offering refuge to its citizens due to the severe impacts of climate change, particularly rising sea levels threatening the low-lying Pacific atolls of Tuvalu. The agreement, termed the Falepili Union, marks the first instance of Australia providing residency to foreign nationals in response to climate change threats. Up to 280 Tuvalu citizens annually will be granted visas permitting them to live, work, and study in Australia. Australian Prime Minister Anthony Albanese emphasized the nation's acknowledgment of its responsibility within the Pacific family, committing to both climate action and security assistance for Tuvalu. The treaty also includes Australia's defense commitment to Tuvalu against military aggression and Tuvalu's agreement not to enter defense pacts with other nations without Australia's approval. Additionally, Australia has pledged financial support, including A$16.9 million, to help Tuvalu adapt to climate change, with initiatives such as expanding the landmass of its main island by 6%. The pact is deemed the most significant agreement ever between Australia and a Pacific country.
Thoughts on adding Tokelau. Assume not, it is dependent territory of NZ (https://en.m.wikipedia.org/wiki/Dependent_territory) and likely to have fairly direct access into the country as citizens. Comes to mind because the place is made up of 3 tiny atolls so likely to have a migration need stemming from climate change
I would consider adding Niue but their topography might provide them with stronger than usual resilience to oceanic climate effects
@JulianLees Niue is in a free association with New Zealand so it is a country but its citizens are also New Zealand citizens with the same rights (I believe) to residency.
There are lots of territories in the Pacific which are to some extent connected to larger countries but I've not included them in these questions as they are often not a country or an ambiguous case, and in all cases it seems clear that their larger partner would be the one to offer resettlement