Following the deposit of ratification instruments by four new countries this week at the United Nations–Sri Lanka, St. Vincent and the Grenadines, Sierra Leone and Morocco- the High Seas Treaty has reached the milestone of 60 state ratifications needed to trigger its entry into force. Formally known as the Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas Beyond National Jurisdiction (or BBNJ Agreement), the Treaty will become legally effective 120 days from today (17 January 2026).

“This historic moment is the culmination of years of dedication and global diplomacy by governments and stakeholders” said Rebecca Hubbard, Director of the High Seas Alliance. “The High Seas Treaty is a powerful testament to multilateralism- showing what the world can achieve when we come together for the common good for our ocean, which covers more than 70% of the planet. Today marks an important step when promises start becoming action.”

The Treaty is the first legally binding international agreement safeguarding marine life in the High Seas, which covers two-thirds of the world’s ocean and plays a critical role in ensuring a healthy planet. It provides new tools to halt biodiversity loss and ocean degradation through enabling the creation of marine protected areas (MPAs) in international waters and ensuring environmental impact assessments of planned human activities. It will also boost equity for developing countries through increasing knowledge and technology access, strengthening capacity, and ensuring the equitable access and sharing of the benefits of marine genetic resources.

These provisions are vital to achieving climate and biodiversity global goals, including the Kunming-Montreal Global Biodiversity Framework (GBF) 30×30 target to protect 30% of the planet’s land and ocean by 2030.

Adopted in June 2023, after nearly two decades of discussion and negotiations, the Treaty opened for signature on 20 September 2023. Palau became the first country to ratify on 22 January 2024, and since then States from every region have joined. In addition to the 60 ratifications, 142 countries plus the European Union have signed, signaling their intent to ratify.

Under the Treaty, the first Conference of the Parties (CoP) must convene within a year of entry into force, likely toward the end of 2026. Preparatory work is already underway at the UN to build the institutions and processes in time for CoP1 that will ensure the Treaty’s ambition and long-term effectiveness. Governments and stakeholders are also laying the groundwork for developing High Seas MPA proposals to protect critical biodiversity sites once the Treaty is operational. These include the Salas y Gómez and Nazca Ridges, the Lord Howe Rise and South Tasman Sea, the Sargasso Sea and the Thermal Dome in the Eastern Pacific.

“Achieving 60 ratifications is not the finish line–it’s just the starting block,” said Rebecca Hubbard. “The Treaty’s true strength lies in universal participation. While we must celebrate this incredible progress, we urge all remaining nations to join this historic Agreement and help us go from 60 to global ahead of the first CoP.”

Further ratifications are expected during the upcoming UN General Assembly High-Level Week in New York (beginning 22 September 2025). 

Notes to editor

• The official status of signatures and ratifications can be found on the UN website and the High Seas Alliance’s ratification tracker. Note: The number shown on the High Seas Alliance tracker reflects only the ratifications that count toward entry into force and does not include the EU’s ratification and therefore differs from the UN’s total count.
• The High Seas Alliance (HSA) sometimes uses the term "High Seas Treaty" as a short-hand for the BBNJ Agreement. HSA acknowledges that the scope of the BBNJ Agreement encompasses all Areas beyond national jurisdiction, including the seafloor and water column. This choice of wording is intended to ease understanding for broad audiences and does not convey a prioritization among the components or principles of the BBNJ Agreement.