One ​​pen, two signatures, and a global commitment. It is in these sober but meaningful terms that Côte d'Ivoire and the Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) sealed, last Friday, at the Ministry of Foreign Affairs and International Cooperation in Abidjan, a bilateral cooperation framework agreement of strategic significance. This agreement formalizes the status of Côte d'Ivoire as a full host state of the structures of the International Surveillance System (ISS), a significant competitive advantage compared to countries not signatories to such mechanisms. Far from being a rupture, this framework agreement is part of the continuity of an already active cooperation. Côte d'Ivoire signed the Comprehensive Nuclear Test Ban Treaty on September 25, 1996 and ratified it in March 2003. Since then, the country has hosted two ISS stations, an infrasound (IS17) at Dimbokro and a seismic (PS15 DBIC), as well as a National Data Center at the Lamto Geophysical Station. More recently, on March 19, 2026, a facility agreement had already established this status of host state, before a Capacity Building System was installed in Lamto.

The scientific dimension occupies a central place in this new partnership. In June 2026, Abidjan had already hosted the first CTBTO training workshop for French-speaking African countries, bringing together experts from nearly fifteen nations including Senegal, Morocco, Cameroon and Togo. A strong signal of the Ivorian desire to position itself as a regional hub for international surveillance. For Dr Robert Floyd, this framework agreement is “the continuation of the strong collaboration between Côte d'Ivoire and the CTBTO” and “marks an important step in strengthening regional and international cooperation in matters of non-proliferation”. By taking on this role of host state in its own right, Abidjan reaffirms its attachment to a world order based on peace, science and multilateral cooperation. This posture is part of a coherent diplomatic trajectory. In June 2025, Côte d'Ivoire chaired, for the first time in its history, the 64th session of the Preparatory Commission of the CTBTO in Vienna. The signature on June 26, 2026 is therefore not an arrival point, but the basis of a broader ambition, to make Abidjan a key player in global nuclear security. double diplomatic and scientific dimension of this commitment.