of Defense may waive the limitation in subsection (a) if the Secretary, in consultation with the Secretary of State and the Director of National Intelligence, determines that it is in the vital national security interest of the United States to do so, and certifies in writing to the congressional defense committees that— (1) Rosoboronexport has ceased the transfer of lethal military equipment to, and the maintenance of existing lethal military equipment for, the Government of the Syrian Arab Republic