Well here's my two cents
(the following is based solely on observations and has not been verified. The owner reserves the right to change the following thoughts without notice)
I rkn the scholarships will most likely be awarded during Oweek. I think that the majority (subject to debate) of Scholarships (at USYD anyway) are funded and awarded by individual faculties (eg. see the front of your handbook and the clauses on conditions that some are non-transferable between faculties) and so I think they will be awarded at the Faculty welcomes, which are listed in the oweek site as "welcome and presentations"
Agree or disagree, we will know soon enough.
All these disclaimers - cant you tell I am doing law