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The Proliferation Security Initiative: Legal Considerations and Operational Realities
Aaron Dunne
SIPRI Policy Paper no. 36
ISBN 978-91-85114-75-7

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The Proliferation Security Initiative (PSI) was conceived in 2003 as a response to a growing threat of the proliferation of weapons of mass destruction. As it marks its 10th anniversary, the initiative faces a continually evolving set of challenges in its efforts to target the transport of consignments of proliferation concern: despite the participation of over 100 states, a number of key states remain opposed, and questions about its legality, activities and effectiveness persist.

This Policy Paper summarizes and clarifies the commitments that a state enters into when it endorses the PSI Statement of Interdiction Principles, examines the legal bases that underpin the initiative, identifies some of the key challenges that it faces, and explores the operational realities of undertaking PSI activities. By doing so, it will help inform the decision making of states considering participation in the PSI, but it will also be of interest to a wider audience and contribute to a better understanding of the PSI more generally.


1. Introduction
2. Development and activities of the Proliferation Security Initiative
3. The Statement of Interdiction Principles
4. Legal considerations
5. Operational realities
6. Challenges for the Proliferation Security Initiative
7. Conclusions and recommendations
Appendix A. Statement of Interdiction Principles

About the author

Aaron Dunne (United Kingdom) is a Senior Researcher with the SIPRI Dual-use and Arms Trade Control Programme, where he undertakes research on a range of strategic trade control issues with a particular interest in enforcement, risk management, new initiatives and system optimization. He regularly contributes to strategic trade control capacity building activities in the Gulf, South East Asia and Europe. Prior to joining SIPRI he was Head of Counter-Proliferation Policy with the UK’s HM Revenue and Customs.

Publisher: SIPRI
ISBN 978-91-85114-75-7
49 pp.
May 2013
Price: €7.50 per copy plus €5 shipping and handling per order


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