"We will have no levers for enforcement of any of the sanctions we might reimpose".
The unsigned memo was written by Richard Goldberg, a former Republican congressional aide who has long advocated tough action against Iran.
Unfortunately, Donald Trump and his administration have cast doubt on continued American compliance with the JCPOA in a series of concerning statements and reports.
IAEA Director-General Yukia Amano defends the verification regime as the "most robust" being conducted anywhere today and insists that military sites are not off-limits.
Bakhtiar said the Europeans do not want to be part of the U.S. game and be blamed for its collapse, urging them to pool their efforts to make the USA remain committed to the deal.
The memo from Goldberg, who was a senior aide to former Republican Rep. Mark Kirk of IL, is created to "help key policy makers in the administration think outside the box and spur more creative conversations", said a source familiar with the discussions behind the document.
Over 80 prominent worldwide disarmament experts have urged US President Donald Trump to reconsider his possible plans to unravel Iran's 2015 nuclear agreement with six world powers, including the US.
The extensions of the waivers on nuclear sanctions, first issued by the Obama administration, were accompanied by new penalties imposed against 11 Iranian people and companies accused of supporting Iran's ballistic missile program or involvement in cyber-attacks against the USA financial system.
Trump has previously certified Iran was in compliance with the accord but he did so reluctantly, complaining to aides about the options presented to him.
The next certification deadline is October 15.
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The United States on Thursday agreed to continue for now to exempt Iran from nuclear-related sanctions but slapped new measures against targets accused of cyber attacks or fomenting militancy.
As part of the worldwide deal, the USA agreed to waive a wide range of sanctions on Iran and must renew the waiver every 120 days.
If the White House decides not to waive the sanctions this week, that could throw the deal in doubt immediately.
Those remarks have led to intense speculation over what may transpire if Trump willfully attempts to unravel the deal, despite the assessment of IAEA investigators and America's own intelligence community that the Iranians are holding up their end of the bargain. The White House is seeking ways to find that Tehran is not complying with the agreement. Haley suggested that Congress could then debate whether to reimpose sanctions on Iran.
US diplomats have approached European officials to see if they would join in demanding an extension to limits on Iran's uranium enrichment that are set to expire in 2025 and 2030 under the nuclear accord reached in 2015, according to people familiar with the discussions.
"The President is looking for a path to "decertification" that can build consensus among his national security advisers, especially those who fear the question: what next?", the memo states.
The Trump White House's threats to dismantle the JCPOA are tremendously risky for the US and the entire world.
"Access under the Additional Protocol will be used by the IAEA to verify at undeclared sites that no unapproved nuclear activity is occurring".
The U.S. still maintains numerous sanctions against Iran over its ballistic-missile program and as a state sponsor of terrorism.