Each code consists of two parts, separated by a hyphen. The first part is AU, the ISO 3166-1 alpha-2 code of Australia. The second part is two or three letters, which is the conventional abbreviation of the state or territory (defined in Australian Standard AS 4212-1994).
Current codes
Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).
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The following changes to the entry have been announced in newsletters by the ISO 3166/MA since the first publication of ISO 3166-2 in 1998. ISO stopped issuing newsletters in 2013.