U.N. Security Council sanctions are not U.S. statutory sanctions, but the clear intent of the legislation is to prevent any sanctions relief until Congress has reviewed the deal.
Iran Deal to Be Sent to UN Security Council Before Congress: A Deliberate Insult by the President
According to news reports, the Obama administration is currently circulating a draft United Nations Security Council resolution to implement the commitments agreed to under the Iran nuclear deal known as the Joint Comprehensive Plan of Action.