Iranian President Hassan Rouhani has ordered the Atomic Energy Organization of Iran (AEOI) to begin research and development of nuclear fuel for naval propulsion systems. The order comes in retaliation to the United States' extension of the Iran Sanctions Act (ISA).  In addition, Iran plans to file a formal complaint with the Joint Commission regarding the ISA extension. Iranian officials have previously announced plans to enrich uranium for nuclear-fueled vessels, including to 60 percent enriched uranium.