14 February 1975
The Order of Australia was established on 14 February 1975 by Her Majesty Queen Elizabeth II on the advice of the Whitlam Government. The Medal of the Order of Australia is a badge with a gold-plated silver insignia of the Order in the centre. The central insignia is inscribed with the word ‘Australia’ in gold capital letters. The circle also contains two gold sprigs of mimosa. The insignia is ensigned with the Crown of St Edward. The medal is hung from the ribbon of the Order. It is royal blue with a central band of mimosa blossoms.