Commonwealth of Australia: Order of AustraliaGeneral DivisionRibbon: Royal blue with a central band of scattered gold mimosa blossoms. 
 Instituted: 14 February 1975. Awarded: For achievement and merit in service to Australia or humanity. Grades: Companion, Officer and Member, plus a Medal. Post-nominal letters: Companion - AC; Officer - AO; Member - AM; Medal - OAM. 
 
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