Over the weekend, the United Nations High Seas treaty — also called the Biodiversity Beyond National Jurisdiction (BBNJ) Agreement, received its 60th and final required ratification to allow it to take effect, from January 2026.

The treaty introduces historically significant measures for the protection of the ocean and marine biodiversity, especially in parts of the ocean that do not fall under the jurisdiction of a single nation.

After decades of negotiation, sixty countries have now ratified the agreement, with a further 145 countries, including New Zealand, being signatories. 

Some of the key aspects of the agreement will be the establishment of Marine Protected Areas, the introduction of legal obligations for countries to maintain high environmental standards around ocean activities, and the advancement of critical climate goals including the ban of bottom trawling and deep sea mining. 

Tuesday Wire Host Sara spoke with Victoria University law professor Joanna Mossop more about the significance of this treaty, and how effective its legal obligations on an international stage will be — starting with her research interest in international marine law

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