If Iran fails to meet its commitments

Today, the P5 1 and Iran reached a set of initial understandings that halts the progress of Iran's nuclear program and rolls it back in key respects.These are the first meaningful limits that Iran has accepted on its nuclear program in close to a decade.The proportion of scrap copper to total The initial, six month step includes significant limits on Iran's nuclear program and begins to address our most urgent concerns including Iran's enrichment capabilities; its existing stockpiles of enriched uranium; the number and capabilities of its centrifuges; and its ability to produce weapons-grade plutonium using the Arak reactor.The concessions Iran has committed to make as part of this first step will also provide us with increased transparency and intrusive monitoring of its nuclear program. In the past, the concern has been expressed that Iran will use negotiations to buy time to advance their program.Taken together, these first step measures will help prevent Iran from using the cover of negotiations to continue advancing its nuclear program as we seek to negotiate a long-term, comprehensive solution that addresses all of the international community's concerns. In return, as part of this initial step, the P5 1 will provide limited, temporary, targeted, and reversible relief to Iran.This relief is structured so that the overwhelming majority of the sanctions regime, including the key oil, banking, and financial sanctions architecture, remains in place.If Iran fails to meet its commitments, we will revoke the limited relief and impose additional sanctions on Iran.The P5 1 and Iran also discussed the general parameters of a comprehensive solution that would constrain Iran's nuclear program over the long term, provide verifiable assurances to the international community that Iran's nuclear activities will be exclusively peaceful, and ensure that any attempt by Iran to pursue a nuclear weapon would be promptly detected.The set of understandings also includes an acknowledgment by Iran that it must address all United Nations Security Council resolutions - which Iran has long claimed are illegal - as well as past and present issues with Iran's nuclear program that have been identified by the International Atomic Energy Agency.