ACM also holds events across Australia each year. The main event is an annual national conference that typically runs for three days, with many invited speakers from the Australian community. Past speakers have included Prime Minister John Howard and former Official Secretary to the Governor-General of Australia Sir David Smith. The last National Conference was held in Melbourne in September 2011. ACM's State Convenors are also responsible for the organisation of events that occur in each of the Australian states and the Australian Capital Territory.