The sixth point of the MoU says the US and regional partners will develop a “definitive, mutually agreed plan” worth at least $300bn (£224bn) for reconstruction and economic development in Iran.
The final mechanism will be agreed within 60 days of the final deal, and all licences, waivers and permissions will be granted by the US.
However, this does not mean the US will be financially involved.
One official noted that the US is not required to pay “a cent of money” to Iran, or contribute to the fund.
As a hypothetical example, the official said that if Iran “behaves”, Emirati authorities could build a power plant in Iran, with US blessing.
Trump and other officials have gone to great lengths to make clear to the US public that it will not be paying Iran directly, which the administration says stands in stark contrast to the 2015 nuclear agreement between Iran and the Obama administration.