Australian special interests ambassadors and envoys are specially-appointed officers of Australia's Department of Foreign Affairs and Trade to represent the interests of the Commonwealth of Australia abroad on a larger scale (such as by continent) or through representing the Commonwealth's approach to various international issues.
While the special interest Ambassadors-at-Large are appointed in the same manner as would a normal Ambassador Extraordinary and Plenipotentiary, they are not credentialed to any state and thus have no treaty-making powers.
Special Envoys are typically appointed by the prime minister of Australia.