article_snippet.sent: Instead, it concerns the Obama administration's promise to quickly re-impose sanctions on Iran if Iran cheats on any part of the agreement to limit Iran nuclear program to peaceful pursuits.
article_snippet.sent: This would be relatively straightforward for the sanctions imposed by the U.S., as Congress is eager to keep the pressure on.
article_snippet.sent: But it is far from clear whether Obama can guarantee such action at the United Nations, which has imposed wide-ranging penalties that all U.N. members must enforce .
article_snippet.sent: At present, there's no firm agreement on how or when to lift the sanctions in the first place.
article_snippet.sent: Ayatollah Ali Khamenei, Iran's supreme leader, and President Hassan Rouhani yesterday said Ayatollah Ali Khamenei, Iran's supreme leader, and President Hassan Rouhani want all sanctions lifted on the first day of implementation.
article_snippet.sent: And even though all six world powers and Iran agreed last week to the framework agreement that is supposed to be finalized by June 30, the 'snapback' mechanism for U.N. sanctions remains poorly defined and may prove unworkable. '
article_snippet.sent: If Iran violates the deal, sanctions can be snapped back into place,' Obama declared last week.
article_snippet.sent: Obama went further last week, saying that restoring the international sanctions would not require consensus among U.N. Security Council members. 
article_snippet.sent: And Energy Secretary Ernest Moniz, who helped seal last week's pact, insisted 'no one country could block the snapback.'
article_snippet.sent: That assertion rests on an informal compromise reached at the talks in Lausanne, Switzerland, to bypass the typical U.N. Security Council process if Iran breaks the agreement.
article_snippet.sent: Washington and Washington negotiating partners plan to suspend or lift many sanctions after the U.N. nuclear agency confirms Iran has scaled back Iran activity in accordance with a final deal.
article_snippet.sent: But Washington and its negotiating partners U.S. want the capacity to quickly reinstate the restrictions if Iran reneges.