German wine tradition
I do not think that Australia has already embarked on this path, but Germany certainly has a long tradition of wine queens and wine princesses (since about the 1930s).
The German wine queen is the elected representative of German wine for the duration of one year. The candidates are the 13 regionally elected wine queens from the officially recognized 13 wine regions.
It is tradition that the new wine queen will be crowned in Neustadt, Pfalz. The 64th German wine queen is Julia Bertram from the Ahr win region. She was inaugurated on September 29.
The German wine princesses (allowed are up to three) are the deputies of the German wine queen. Usually the runner-up in the election is appointed wine princess. Currently there are two, Anna Hochdörffer, Pfalz, and Natalie Henninger, Baden.
The electoral college consists of about 70 members. I could neither find out how the selection committee is composed nor how these jury members are selected, though. From the 13 regional wine queens, normally six are nominated as finalists for the contest. The jury elects one as queen and two as her princesses. Of the 64 queens, 11 came from my native Mosel.
The candidates do not need to come from a winery or vineyard but need solid knowledge about German wine and the wine industry, oenology and wine-making. The wine queen and the princesses are representing the wine industry for a year at all major wine festival, fairs, exhibitions, wine tastings, including international events. They need to be eloquent and good ambassadors for the German wine industry.