In this May 24, 2021 photo, the flag of Iran is seen in front of the building of the International Atomic Energy Agency (IAEA) Headquarters in Vienna, Austria. (MICHAEL GRUBER/GETTY IMAGES EUROPE VIA BLOOMBERG)
WASHINGTON – The United States and Iran have found a way to address the UN nuclear watchdog's investigations of Tehran's atomic program that allows both to claim victory for now but delays a final resolution, according to three sources familiar with the matter.
Tehran has pushed Washington to commit to close probes by the International Atomic Energy Agency into uranium traces found at three undeclared sites before it will fully implement a proposed deal to revive the 2015 Iran nuclear pact.
Resolution of the so-called "safeguards" investigations is critical to the UN agency, which seeks to ensure parties to the Nuclear Non-Proliferation Treaty are not secretly diverting nuclear material which they could use to make a weapon
The United States and its partners, however, reject that stance, arguing the investigations can only conclude when Iran has given satisfactory answers to the Vienna-based agency.
As a result, Iran has said it will not carry out the deal unless the probes have been closed, postponing the fundamental question of whether the IAEA will close them and whether Iran might go ahead with the wider deal if not, the sources said.
Resolution of the so-called "safeguards" investigations is critical to the UN agency, which seeks to ensure parties to the Nuclear Non-Proliferation Treaty are not secretly diverting nuclear material which they could use to make a weapon.
ALSO READ: Iran receives US response to Tehran's views on nuke deal
While a senior US official said last week that Iran had "basically dropped" some of the main obstacles to reviving the 2015 deal, including on the IAEA, the issue seems to have been deferred.
"Iran originally had wanted a commitment that the IAEA would complete the agency's safeguards investigations by a date certain," said a US official on condition of anonymity, saying the United States and its partners refused this.
"Iran came back and stated that if the safeguards issues were not resolved by Re-Implementation Day, they would reserve the right not to take the steps to curb their nuclear program slated to occur on that date," said the US official.
The draft on reviving the 2015 agreement lays out steps culminating in Re-Implementation Day – a nod to the original deal's Implementation Day, when the last nuclear and sanctions-related measures fell into place, diplomats have said.
ALSO READ: Experts: US must prove ‘sincerity’ over Iran deal
This week, Iran stuck to its guns.
"The IAEA probes should be closed before the Re-Implementation Day" if the 2015 deal is revived, Iran's nuclear chief Mohammad Eslami said on Wednesday.
The US official said that if Tehran had not cooperated with the IAEA by that time, Iranian leaders would face a choice: "Either delay or even forgo the expected sanctions relief, or proceed with implementing the deal even as the investigations into the open cases persist."
The IAEA issue threatens to prevent a revival of the 2015 pact, abandoned by then-US President Donald Trump in 2018, under which Iran had curbed its nuclear program in return for relief from US, EU and UN sanctions.
READ MORE: Borrell: Most countries in Iran nuke talks support EU proposal
After reneging on the deal, Trump reimposed US sanctions on Iran, leading Tehran to resume previously banned nuclear activities and reviving US, European and Israeli fears that Iran may seek an atomic bomb. Iran denies any such ambition.
The probes mainly relate to apparently old sites dating to before or around 2003, when US intelligence agencies and the IAEA believe Iran halted a coordinated nuclear arms program. Iran denies ever having such a program.
Eurasia Group analyst Henry Rome said that if a deal were agreed it was more likely than not to be implemented.
"But there would be a lot more uncertainty now than there was back in 2015," he said.