On 22 September 2021 the Alliance of Small Islands (AOSIS), during a virtual AOSIS Leaders’ Summit, endorsed The Alliance of Small Islands Leaders’ Declaration 2021. The Leaders’ Declaration focuses on climate change, sustainable development and the ocean. This includes recognising states’ ocean-related responsibilities (preamble), the existing impacts of climate change on SIDS (para. 3), concerns over GHG emissions from shipping and the need for action (para. 15), the BBNJ Agreement process (paras. 39-40), fixed baselines and outer limits of maritime zones – once given due publicity (para. 41), marine plastic pollution –and more generally the need for a new legally binding global agreement on plastic pollution– (paras. 42-43) and enhancing technology transfer, scientific knowledge and recognition of traditional knowledge (para. 44).