An Anticipated Announcement Iran is moving forward, as promised, with its third phase of pulling back from commitments made under the 2015 nuclear deal, known as Joint Comprehensive Plan of Action (JCPOA), to limit the development of its nuclear energy program. Iranian President Hassan Rouhani announced that starting Sept. 6, the Atomic Energy Organization of Iran would suspend all the JCPOA limits related to research and development and the testing of centrifuges, including: Conducting R&D in a way that does not accumulate enriched uranium. Limiting R&D for uranium to only the IR-4, IR-5, IR-6 and IR-8 centrifuges. Limiting mechanical testing of these centrifuges to two single centrifuges of each type. Halting research for other isotope separation technologies. The first phase of Iran's gradual JCPOA suspension was announced in May, which saw Tehran increasing its stockpiles of low enriched uranium shortly thereafter.