They will have 1 this year commencing 27 October and finishing 30 October. Forward plans have been announced for a minimum of 2 in 2018 and a minimum of 3 in 2019.
Read my latest summary here:
https://hotcopper.com.au/threads/28-days-to-auction-20-trading-days.3719283/#.WdD5PkHZWaM