Iran passed a law requiring the Atomic Energy Organization of Iran (AEOI) to resume enriching uranium to the level of 20 percent, in response to the assassination of Mohsen Fakhrizadeh, a top scientist in Iran's nuclear program. The law also compels Iran to expel inspectors from the International Atomic Energy Agency (IAEA) within two months unless the United States lifts sanctions on Iran's financial and petroleum sectors. The law was subsequently ratified by Iran's Guardian Council. Iranian President Hassan Rouhani criticized the law, which he described as "damaging for diplomacy." The production of higher levels of enrichment will require Iran to adjust the infrastructure at its Natanz nuclear facility.