The appointment of Ghasemi as Iran's oil minister automatically makes him the head of Opec which has a crucial role in determining oil prices.
As its second-largest crude oil exporter, Iran took the presidency of Opec after 36 years last October and Ghasemi's position will give the revolutionary guards a unique opportunity to influence an international organisation.
http://www.guardian.co.uk/world/2011/aug/03/iranian-opec-president-revolutionary-guards