On 17 January 2026, after two decades of negotiation, the High Seas Treaty entered into force — the first legal instrument able to protect marine life in the two-thirds of the ocean that lies beyond any country's jurisdiction. For all of history those waters have been effectively ungoverned, open to fishing, shipping and, soon, mining, with no mechanism to set any of it aside.
The treaty changes that on paper. It lets states create marine protected areas on the high seas, requires environmental assessments of new activities, and shares the benefits of marine genetic resources with poorer nations. Its first Conference of the Parties is due later this year, and the first candidate sanctuaries are already named: the Salas y Gómez and Nazca ridges off South America, the Lord Howe Rise in the South Pacific, the Sargasso Sea.
The distance between the text and the water is the story. A high-seas marine park is only as real as its enforcement, and, as one negotiator put it, international law has no international police; a satellite can name and shame a rogue trawler, but no one is stationed mid-ocean to stop it. The treaty's own machinery — the institutions that will designate and monitor these areas — is still being built, and getting that plumbing right, unglamorous as it is, will decide whether the agreement delivers protection or merely paperwork.
And some of the largest players are standing outside. The United States, the United Kingdom, Russia and India are among those yet to ratify — over the same stretch in which Washington moved to fast-track seabed mining and stepped back from a shipping-emissions deal. A treaty for the global commons works only if the commons' biggest users are bound by it. The High Seas Treaty is a genuine turning point, the strongest ocean-governance tool ever built. Whether it becomes more than that depends on the year now beginning.
Sources
In force, and what it does: the Pew Charitable Trusts on the treaty's entry into force and its provisions; Wikipedia's treaty record on the sixtieth ratification that triggered it. The first COP and the candidate sanctuaries: Rise Up for the Ocean on the Conference of the Parties timeline and the first proposed high-seas MPAs; Euronews on the year's stakes and the enforcement problem. The holdouts: Al Jazeera on the major economies yet to ratify.
Further Reading
The other view from Washington: the Atlantic Council on why the United States has held back from the Law of the Sea framework — and what it sees itself gaining or losing by staying out.