Iran's nuclear deal with six major powers (P5+1) will come into force on January 20, European Union High Representative Catherine Ashton said in a statement on Sunday.
Ashton represents the P5+1 (United States, Russia, China, France, Britain and Germany) as a chief negotiator in nuclear talks with Iran.
"We will ask the International Atomic Energy Agency (IAEA) to undertake the necessary nuclear-related monitoring and verification activities," she said.
Ashton also said that Iran's chief negotiator Abbas Araqchi and European Union deputy foreign policy chief Helga Schmid have found solutions to disagreements on how to implement the first measures of the November 24 agreement and it has been confirmed by all sides.
US President Barack Obama welcomed the implementation agreement, and said the US would give "modest relief" on Iranian sanctions as long as Iran lives up to its end of an agreement.
Obama said the agreement will help to “prevent Iran from building a nuclear weapon and today's agreement was concrete progress."
Iran's Deputy Foreign Minister and chief negotiator Abbas Araqchi told the reporters that once Iran begins to implement the Geneva deal, the six powers – five permanent members of UN Security Council plus Germany – will begin to ease sanctions on Tehran.
“Today, Iran and the P1+5 finalized an agreement on ways to take the step to implement the Joint Plan of Action. The two sides reached a concensus,” said Araqchi.
US Secretary of State John Kerry, who also released a statement, said the negotiations will be “very difficult but this agreement represents the best chance to resolve this issue peacefully.”
“We will be extraordinarily vigilant in our verification and monitoring of Iran’s actions, an effort that will be led by the International Atomic Energy Agency” said Kerry.
He said P5+1 partners and US will also take steps in response to Iran fulfilling its commitments, “to begin providing some limited and targeted relief.”
Under the Geneva deal, P5+1 countries undertook to provide Iran with some sanctions relief in exchange for Iran agreeing to limit certain aspects of its nuclear activities during a six-month period. It was also agreed that no further nuclear-related sanctions would be imposed on Iran within the same time frame.
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