The United Nations Security Council would endorse any final nuclear agreement between Iran and the P5+1 group, US State Department spokeswoman Jen Psaki has said.
"We would anticipate that, if we're able to reach a joint comprehensive Plan of Action between the P5+1 and Iran, an endorsement vote would be held by the UN Security Council," Psaki told reporters during a press briefing.
She added that Washington’s unilateral restrictions imposed against Tehran would be in place, even if the UN Security Council decides to ease its sanctions on the country.
Iran and the P5+1 group -- the US, Britain, France, China, Russia, and Germany -- are currently working to complete the outlines of a nuclear deal by the end of March after they reached an interim agreement in November 2013.
The two sides have by the end of June to clinch a final agreement.
A new round of talks between US Secretary of State John Kerry and Iranian Foreign Minister Mohammad Javad Zarif is expected to take place in Lausanne, Switzerland on March 15.