"On October 13, 2017, President Trump announced a new U.S. strategy on Iran. He stated that, under the Iran Nuclear Agreement Review Act (INARA; P.L. 114-17), he would not be certifying that continued Iran sanctions relief is proportionate to the measures taken by Iran to terminate its illicit nuclear program. That and other INARA certification requirements are related to, but separate from, Iran's nuclear obligations under the July 14, 2015, multilateral nuclear agreement (Joint Comprehensive Plan of Action, or JCPOA). The withholding of INARA certification does not automatically end U.S. participation in the JCPOA, which the UK, France, Germany, the United States, Russia, and China negotiated with Iran. But the President linked continued U.S. participation to congressional and allied action to address deficiencies in the JCPOA that he identified in his October 13 statement [...]."
CRS Insight, IN10656
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html