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Max Planck Encyclopedia of Public International Law [MPEPIL]

Proliferation Security Initiative (PSI)

Michael Byers

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2021. All Rights Reserved.date: 19 January 2021

Weapons of mass destruction — Self-defence — Flag state — High seas — Arms control — Security assistance

Published under the auspices of the Max Planck Institute for Comparative Public Law and International Law under the direction of Professor Anne Peters (2021–) and Professor Rüdiger Wolfrum (2004–2020). 

1 In December 2002, Spanish marines, acting on a request from the United States of America (‘US’), boarded the So San, a North Korean freighter crossing the Arabian Sea. Hidden under the bags of cement listed on the manifest were 15 Scud missiles. However, when Yemeni officials declared that they had purchased the missiles, the Kingdom of Spain and the US allowed the delivery to proceed. US Press Secretary Ari Fleischer explained, ‘we have looked at this matter thoroughly. There is no provision under international law prohibiting Yemen from accepting delivery of...
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