UN BBNJ High Seas Treaty enters into force on 17 January 2026

The UN Biodiversity Beyond National Jurisdiction (BBNJ) treaty entered into force on 17 January 2026 after over 15 years of negotiations, covering marine biodiversity in international waters. The legally binding framework reshapes global ocean governance and marine ESG compliance, potentially affecting fisheries, shipping, biotechnology and offshore energy sectors with implications for blue economy investments.

The UN Biodiversity Beyond National Jurisdiction (BBNJ) treaty entered into force on 17 January 2026 after more than 15 years of negotiations. The legally binding framework covers marine biodiversity in international waters, regions accounting for roughly two-thirds of the planet's oceans and nearly half of Earth's surface. The instrument surpassed the required 60 state-parties threshold in September 2025, with over 80 countries ratifying as of January 2026, including China, Brazil, and Japan. The treaty empowers countries to establish marine protected areas throughout areas beyond national jurisdiction, shifting governance from voluntary regimes to an enforceable international mechanism.

Fisheries, shipping, biotechnology and offshore energy sectors are affected, alongside business and financial sectors making blue economy investments. States must conduct environmental impact assessments for activities affecting marine ecosystems and negotiate frameworks for equitable sharing of marine genetic resources, a growing frontier in biotechnology and sustainable blue economy sectors. The treaty does not currently regulate deep-seabed mining, which remains under the separate governance of the International Seabed Authority. Stronger environmental standards and conservation obligations could influence marine resource supply chains and risk assessments tied to ocean health.

Governments must integrate treaty obligations into national laws, and ratifying countries must adopt national laws and procedures to act on treaty mandates. Affected entities should track the first Conference of Parties, expected within one year of entry into force, which will harmonize approaches, set marine spatial planning guidelines, and coordinate scientific research. Realizing the 30 by 30 goal of protecting 30% of oceans by 2030 will require establishing more than 190,000 protected areas across international waters, up from roughly 8% coverage today, which businesses should monitor for compliance implications.

Key figure — Conservation target: protect 30% of the world's oceans by 2030, up from roughly 8% today