The United States Wednesday put forward a draft resolution to the UN Security Council seeking backing for a historic deal about Iran’s nuclear program as a first step for international approval of the accord.

The United States Wednesday put forward a draft resolution to the UN Security Council seeking backing for a historic deal about Iran's nuclear program as a first step for international approval of the accord.

The draft text seeks formal UN endorsement for the agreement reached in Vienna on Tuesday after 18 straight days of talks which capped almost two years of momentous negotiations.

The new resolution would also replace the existing framework of seven sets of Security Council sanctions imposed since 2006 on Iran, enshrining a new set of restrictions.

"We have now formally introduced this Iran resolution into the Security Council," a US diplomat said.

Under the deal, hammered out by six world powers and Iran, a web of sanctions will be gradually lifted.

A vote on the resolution could come as early as Monday or Tuesday, a diplomat said.

The draft resolution should pass with little difficulty since the five veto-wielding permanent members of the UN Security Council -- Britain, China, France, Russia and the United States -- were among those countries which negotiated the Vienna accord.

The draft text was put forward by the US ambassador to the United Nations, Samantha Power during closed door talks on Wednesday.

Once the UN Security Council resolution is agreed, that will start the clock ticking on the first deadline known as Adoption Day, some 90 days after the UN endorses the agreement.

Under the deal, all parties from that day must begin to make the necessary legal and administrative preparations to implement the full deal later on.