Executive Secretary Lassina Zerbo addressing the NPT Review Conference

Federica Mogherini, EU High Representative for Foreign Affairs and Security Policy and Member of the GEM, with CTBTO Executive Secretary Lassina Zerbo

Executive Secretary Lassina Zerbo and Ambassador Taous Feroukhi of Algeria, President of the 2015 NPT Review Conference

CTBT side event at the 2015 NPT Review Conference “The Urgency of Action on the CTBT Contributing to International Peace and Security in an Increasingly Unstable World”.

Executive Secretary Lassina Zerbo at the CTBT side event, NPT Review Conference 2015

Yerzhan Ashikbayev, Deputy Foreign Minister of Kazakhstan

Rose Gottemoeller, U.S. Under Secretary of State for Arms Control and International Security

Jayantha Dhanapala, Senior Advisor to the President of Sri Lanka and GEM Member (left)
and CTBTO Executive Secretary Lassina Zerbo

Takeshi Hikihara, Director-General, Disarmament, Non- Proliferation and Science Department, Japan

Lord Desmond Browne, Vice Chairman, Nuclear Threat Initiative and GEM Member

Tariq Rauf, Director, SIPRI Arms Control and Non-proliferation Programme

Laura Kennedy, Charge d'Affaires at the U.S. Mission to the UN in Vienna

Deputy Foreign Minister of the Republic of Korea Mr Shin Dong-ik (right) and Executive Secretary Lassina Zerbo

Executive Secretary Lassina Zerbo briefs the media at UN Headquarters in New York
together with Deputy Spokesperson to the UN Secretary-General Farhan Haq (right)

Executive Secretary Lassina Zerbo briefs the media at UN Headquarters in New York together with Deputy Spokesperson to the UN Secretary-General Farhan Haq (right)

NPT Review Conference: support for the CTBT voiced over 100 times

After the first week of the Review Conference of the Nuclear Non-Proliferation Treaty (NPT), over 100 countries have expressed support for the Comprehensive Nuclear-Test-Ban Treaty (CTBT) and highlighted the urgency to bring the Treaty into force – see collection of relevant excerpts.


In his opening statement to the conference (delivered by Deputy Secretary-General Jan Eliasson), UN Secretary-General Ban Ki-moon warned that "Instead of a Comprehensive Nuclear Test-Ban Treaty in force or a treaty banning the production of fissile materials for nuclear weapons, we see expensive modernization programmes that will entrench nuclear weapons for decades to come."

Mere words of support without real action will not suffice. Bringing the CTBT into force is the responsibility of all NPT States Parties.Executive Secretary Lassina Zerbo's statement to the NPT Review Conference

In addition to many individual States endorsing the CTBT, a number of regional groups have also voiced their support for the Treaty:


In a statement delivered by Mohammad Javad Zarif, Foreign Minister of Iran, the Non-Aligned Movement (NAM) asserted that: "The improvement of existing nuclear weapons and development of new types of nuclear weapons violate the commitments undertaken by the nuclear-weapon States at the time of the conclusion of the Comprehensive Nuclear-Test-Ban Treaty." In a later statement, the NAM added that: "We stress the significance of achieving the universal adherence to the Comprehensive Nuclear-Test-Ban Treaty and realizing its entry into force...To strongly support a comprehensive ban on all forms of nuclear-weapon tests without exception, as well as any nuclear explosion, and reaffirm the importance of such a ban in the realization of objectives of the Non-Proliferation Treaty."

The Caribbean Community (CARICOM) said that: "The elimination of the testing of nuclear weapons remains a critical element in the overall process of nuclear disarmament and non-proliferation. To this end, we urge the 8 remaining Annex 2 States to sign and/or ratify the Comprehensive Nuclear-Test-Ban Treaty immediately and unconditionally, in order to enable its entry into force. We applaud the work of the Provisional Secretariat of the Comprehensive Nuclear-Test-Ban Treaty Organization in promoting the entry into force of the Treaty."

Executive Secretary Lassina Zerbo met with the EU's High Representative for Foreign Affairs and Security Policy, Federica Mogherini, on the margins of the conference.

On behalf of the European Union, Federica Mogherini, High Representative for Foreign Affairs and Security Policy, Vice-President of the European Commission and Member of the CTBT Group of Eminent Persons (GEM) stated: "The entry into force of the Comprehensive Nuclear-Test-Ban Treaty remains a top priority for the EU and we confirm our full support to the excellent work of the CTBTO."


In the margins of the conference, Executive Secretary Zerbo met with Mogherini, who confirmed her willingness to maintain her membership in the GEM. They also agreed to explore the possibility of the European Union hosting a GEM meeting on the twentieth anniversary of opening up for signatures of the CTBT in 2016, see European Commission's website.

In its statement, the Community of Latin American and Caribbean States (CELAC) reiterated "the importance of the early entry into force of the CTBT and urges those States in Annex II of the Treaty whose ratification is essential for its entry into force to accelerate the signature and/or ratification process of this instrument."

In a joint statement the P5 States - China, France, Russia, the United Kingdom and the United States -  declared: "Our commitment to nuclear disarmament extends to efforts to bring the Comprehensive Nuclear-Test-Ban Treaty (CTBT) into force at an early date. We look forward to the 9th Conference on Facilitating the Entry into Force of the CTBT to be held in September in New York. We urge all states that have not done so to sign and ratify the Treaty as soon as possible to bring about its entry into force…

We are working closely with the Preparatory Commission for the CTBT Organization in Vienna on the development of the Treaty’s verification regime, including its International Monitoring System, International Data Centre, and On-Site Inspection. Since the 2010 Review Conference, we have contributed extensively to the development of the Treaty’s on-site inspection element, supplying personnel, equipment, and research. This has been in addition to our long standing efforts to reinforce the organization’s detection capability through contributions in-kind and expert participation in Working Groups. Against this backdrop, we welcome the highly successful Integrated Field Exercise in Jordan late last year. We also call for all signatories to support efforts to complete the necessary preparation for the effective implementation of the CTBT’s verification regime on its entry into force. In this regard, we recall our joint statement, issued following the 2015 P5 London Conference, on minimizing the impact of medical isotope production on the global radioactive monitoring activity, while recognizing that medical isotope production is critically important."