ISN Students Witness History: The High Seas Treaty Enters into Force

On 17 January 2026, a long-awaited victory for ocean protection became a reality: the High Seas Treaty officially entered into force. After more than two decades of negotiations, this historic agreement took effect in record time—less than six months after its adoption—following the powerful momentum of the 3rd United Nations Ocean Conference (UNOC3), held in Nice from 9 to 13 June 2025.

Known internationally as the BBNJ Treaty, this landmark text reflects a growing global awareness: our ocean urgently needs stronger protection, especially in the vast areas beyond national borders. Signed by 145 countries and ratified by more than 80, the treaty represents a major breakthrough for marine biodiversity, international cooperation, and the future balance of our planet.

A historic moment for ocean protection in Nice

To honour this milestone, Nice City Hall hosted an official ceremony at the Hôtel de Ville, gathering representatives from around the world to mark the beginning of a new era in global ocean protection.

The ceremony brought together key figures and representatives from the 81 signatory States, including Christian Estrosi, Mayor of Nice and President of the Nice Côte d’Azur Metropolis, co-organiser of UNOC3; Olivier Poivre d’Arvor, Special Envoy of the President of the French Republic and Ambassador for Polar Regions and Maritime Issues, co-organiser of UNOC3; Kamal Amakrane, Special Envoy of the President of the United Nations General Assembly for Climate and Director-General of the Global Centre for Climate Mobiliy; and Ana Elena Pinto Linzano, Ambassador of Costa Rica and co-organiser of UNOC3, alongside ambassadors of the signatory countries.  

ISN students at the heart of real-world action

For ISN, being invited to participate in such a meaningful event was a true honour. A delegation of Middle School and High School students attended the ceremony and experienced first-hand how international decisions become real commitments for our shared planet.

As ISN sustainability coordinator Melanie Laroche highlighted, this event strongly connected learning with real-world action:“Six months ago, ISN students were present and actively participated in the UN Ocean Conference, where they deepened their understanding of the urgent need to protect marine life and marine protected areas. Six months later, they were there again at the Mairie de Nice for the entry into force of the High Seas Treaty on 17 January 2026. Signed by 85 countries, this treaty marks a major milestone in ocean conservation and the sustainable use of the ocean. This sends a powerful message to our students: UNOC was not just words, but real action. As a proud Blue School, we are committed to engaging our students, who clearly understand what is at stake and belong to a new generation ready to continue this vital fight for the environment.”

Beyond observing, students also had the opportunity to speak with several participants and take part in meaningful discussions about ocean challenges and urgent solutions—using English, French, and Spanish, showing their confidence as global citizens.

Spanish teacher Carolina Hernandez reflected on the depth of this experience for the school community: “Witnessing the signing of the Treaty was a historic moment that left a profound mark on our students and on our entire community—an inspiring and truly transformative experience. I sincerely thank the Embassy of Costa Rica and its representatives in France and in Costa Rica, with whom we began this valuable dialogue in 2022, and the Minister of Culture for the warmth and passion with which he accompanied our students, generously sharing the cultural richness of his country, the greatness of Santuario, and the power of Spanish as a language that unites, inspires, and transcends”. 

For many students, the experience was not only educational, but deeply inspiring. Mai-li (Grade 8) shared her thoughts after attending the ceremony: «Attending the High Seas Treaty event in Nice on Saturday was a powerful experience for me. I would like to especially thank my teachers and the principal for allowing me to attend, as well as all the personalities present for their commitment. What I experienced fully aligns with my beliefs regarding the WHO recommendations, which remind us how essential the protection of the oceans and our environment is for everyone’s health.”

Anna (Grade 10) shared how meaningful the experience was for her: “While participating in the signing of the "High Seas Treaty" in the Mairie de Nice, I felt very inspired and motivated. First, because I care about the development of ways to save our oceans and seas but also because I am very interested in such social events where significant figures as well as role models present their speeches and speak so freely and passionately about their topics. I am very interested in public speaking and speeches, especially when they are motivating, captivating and come from the person's heart. When Estrosi was speaking, I was most sparked, as his words really impressed me. This Treaty touched me and motivated me to act better towards the environment, but also moved me in a personal way. I am very grateful that I got invited to participate in such an event!” 

Gratitude and a Shared Commitment to the Future

At ISN, we strongly believe that experiences like this help shape the leaders of tomorrow—young people who are informed, inspired, and ready to act. And what better place for such an important moment than Nice, on the shores of the Mediterranean Sea.

ISN Head of School Mel Curtis praised the institutions and representatives who supported student participation:

“We extend our warmest thanks to Mr. Christian Estrosi, Mayor of Nice, and to Nice City Hall, as well as to all participating ambassadors and representatives, for their dedication and for supporting the inclusion of young people in such a significant international event. Giving students a voice sends a clear and inspiring message: young people are not only the leaders of tomorrow—they are already contributors today.

A very special and heartfelt thank you also goes to Mrs. Maty Diouf, Deputy Mayor of Nice in charge of Women’s Rights and Gender Equality and International Cooperation, and Metropolitan Councillor. Through her constant efforts, she has championed the inclusion of young people and women in UNOC and broader ocean initiatives, ensuring their voices are heard in key discussions and strengthening partnerships that support meaningful participation.”

The presence of ISN students symbolised exactly that: a generation ready to learn, to engage, and to take responsibility. Protecting the high seas is not only about saving ecosystems—it is about protecting our shared future.