According to the officials, because the fatwa was issued in February 1989 by Iran's revolutionary founder and Khamenei's predecessor Ayatollah Khomeini, who had since died, it would always remain in existence. "The key thing from our point of view is that the Iranian government formally withdrew their support for the fatwa on Salman Rushdie in 1998 which is when Britain and Iran formally upgraded their relationship to the level of ambassador," said the Foreign Office.