Diarchy - Wikipedia Shared power arrangements within a modern bureaucracy may also be known as a "diarchy" or "duumvirate" Examples include the joint authority of the Chief of the Defence Force and the Secretary of the Department of Defence over the Australian Defence Organisation
Duumvirate Definition, Meaning Usage | FineDictionary. com Webster's Revised Unabridged Dictionary Duumvirate The union of two men in the same office; or the office, dignity, or government of two men thus associated, as in ancient Rome