The United Nations Biodiversity of Areas Beyond National Jurisdiction Treaty, also known as the High Seas Treaty or the BBNJ treaty, is a legally binding instrument for the conservation and sustainable use of marine biological diversity in areas beyond national jurisdiction. There is some controversy over the popularized name of the agreement. It is an agreement under the United Nations Convention on the Law of the Sea (UNCLOS). The text was finalised during an intergovernmental conference at the UN on 4 March 2023 and adopted on 19 June 2023. Both states and regional economic integration organizations can become parties to the treaty.