(United States Supreme Court) - Affirming lower court determinations that a collection of ancient clay tablets and fragments owned by Iran and housed in Chicago could not be subject to the attachment and execution of a judgment against the country by the petitioners because although the Foreign Sovereign Immunities Act would normally prevent such attachments these grants of immunity are subject to an exception where the foreign state is designated as a state sponsor of terrorism and the claims occur out of acts of terrorism, but this is not blanket immunity and the immunity of the property at issue must be rescinded under separate provisions of the Act.
Source: findlaw.com