U.S. President Donald Trump would not withdraw from the Iran nuclear deal, but he would decertify Iran’s compliance with the landmark deal reached in 2015, said U.S. Secretary of State Rex Tillerson on Friday.

Decertifying Iran’s compliance with the terms of the Joint Comprehensive Plan of Action (JCPOA), which is the official name of the agreement, will give the US Treasury Department broad authority to impose sanctions on Iran’s Revolutionary Guard Corps (IRGC), Tillerson added.