The Chairman of the National Defence Commission was the head of the commission, and was the de facto highest official in North Korea from 1998 until 2009 and the de jure supreme leader of North Korea from 2009 until 2012. The chairman of the National Defence Commission also served as the supreme commander of the Korean People's Army. From 1972 until 1992, the President was the ex officio chairman of the National Defence Commission. Since 1992, the chairman of the National Defence Commission was no longer required to be the President and was elected by the Supreme People's Assembly.