Instead of asking the Congress to immediately reimpose sanctions on Iran, Trump is asking the Congress to carry out necessary amendments in the Iran Nuclear Agreement Review Act or INARA, which would trigger in automatic and immediate sanctions in case of Tehran violating the conditions determined by it, Tillerson said.
"The President has come to the conclusion that he cannot certify under INARA that the sanctions relief that was provided is proportionate to and affect the benefit that were seeing from that agreement, he told reporters as Trump is scheduled to address the nation on the new Iran strategy later tonight.
The Iran nuclear deal was signed by Iran and 5+1 group of countries (Britain, China, France, Russia, the US and Germany) in 2015 under which Iran agreed to freeze its nuclear programme for 15 years in exchange for sanctions relief.
"The intent is that we will stay in the JCPOA, but the president is going to decertify," said Tillerson.
More From This Section
"We don't think that nuclear agreement should define the entire policy. Quite frankly in the past it is more or less has defined Iran policy," he said.
Noting that its nuclear programme is of big concern, he said but there are also many more immediate concerns that the US has with Tehrans destabilising activities in the region.
This includes their support of terrorist organisations, regional destabilising activities and their export of foreign fighters throughout the region to destabilise areas in support of other terrorist activities.
"The intent is we will stay in the JCPOA, he said.
Tillerson said this is to indicate to American partners that in the joint commission plan of action or JCPOA that there are some areas that were not addressed under the nuclear agreement that the Trump administration thinks require further addressing most specifically the ballistic missile programme and the expiry date.
"It is more likely means that we would undertake an initiative to have a new agreement that doesn't replace the JCPOA but addresses these two issues and lays along beside the JCPOA," he said.
Again, that's going to require everybody's willingness to engage on the issues, he said.
"We have been having discussions with European signatories for many months on this issue and we've even had discussions with the Iranians. I've indicated this to Foreign Minister Zarif when we saw each other on the margins of the UN," the Secretary of State said.
"They indicate they do have those same concerns, we are convinced that none of these new sanctions will in any way bring anyone in violation of their obligations for sanctions relief under the JCPOA because these sanctions are being imposed for non-nuclear activities, he said.
According to Tillerson, the idea is to give the US leverage to negotiate a separate deal to eventually replace the Iran deal.
"But part of this is we want to motivate the other signatories and Iran, lets start the engagement now. So that is one of the motivations," said the top American diplomat.