<P> The Queen of Australia is Sovereign Head of the Order, while the Governor - General is Principal Companion / Dame / Knight (as relevant at the time) and Chancellor of the Order . The Governor - General's Official Secretary, currently Mark Fraser, is Secretary of the Order . </P> <P> The order is divided into a general and a military division . The five levels of appointment to the order in descending order of seniority have been: </P> <Ol> <Li> Knight and Dame of the Order of Australia (AK and AD--discontinued, original quota of 4 per annum); </Li> <Li> Companion of the Order of Australia (AC--quota of 35 per annum); </Li> <Li> Officer of the Order of Australia (AO--quota of 140 per annum); </Li> <Li> Member of the Order of Australia (AM--quota of 340 per annum); and </Li> <Li> Medal of the Order of Australia (OAM--no quota). </Li> </Ol> <Li> Knight and Dame of the Order of Australia (AK and AD--discontinued, original quota of 4 per annum); </Li>

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