Nothing in the convention will impact intelligence operations or the proliferation security Initative
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The US-developed PSI is directed toward preventing the illicit transportation by ships of weapons of mass destruction, their delivery systems and related materials. Under the Law of the Sea Convention and customary international law, a number of jurisdictional bases exist for stopping and searching ships suspected of being engaged in some sort of illicit activity. These include jurisdiction exercised by a State with respect to ships flying its flag or within its territorial sea, ports or contiguous zone, and stateless vessels. It is also permissible to stop and search a foreign-flag vessel with the permission of the flag State. The PSI builds on this latter basis of jurisdiction with a series of bilateral agreements by which the United States and its treaty partners agree in advance on a set of orderly procedures for the reciprocal granting of permission for visits and search of suspected ships and cargoes. There is nothing in the Convention that would change the law in any respect with respect to the US practices under the Proliferation Security Initiative. Likewise, with respect to intelligence operations, the Law of the Sea Convention contains no restrictions on US naval surveillance and intelligence operations not already included in the 1958 Convention on the Territorial Sea and Contiguous Zone to which the United States is already a party.
Opponents of U.S. ratification of UNCLOS have argued that U.S. intelligence operations will be complicated by UNCLOS because it will prevent U.S. submarines from gathering intelligence in territorial waters. However, these operations are already regulated by the existing 1958 convention which the U.S. ratified and expects other nations to abide by. Furthermore, the intelligence community has reviewed the treaty and concluded that it was still in U.S. interests to ratify the treaty.
U.S. participation in UNCLOS will in no way undermine its participation in the Proliferation Security Initiative. In fact, ratification will do more to help bolster the PSI regime as critically important democratic Pacific countries have indicated a desire to support our counter-proliferation efforts, but will not do so as long as the U.S. is a non-party to UNCLOS.