At Mackey Park, Tempe and also at Royal Sydney Golf Club. Probably 4 qualifying blocks followed by a best-of-3 knockout, plus consolation events.
https://portal.revolutionise.com.au/cnsw/events/319519

NSW GC Open Singles Championship

Brown plate block

Wins Losses Net
Hoops
#
Ann Clifton (Queanbeyan) 3 0 +4 1
Terry Abbott (Killara) 1 2 -2 =2
Rodney Peet (Maitland) 1 2 0 =2
Pauline Markwell (Royal Sydney Golf Club) 1 2 -2 =2

Ranked by the share of matches won. A tournament's own regulations may place its players otherwise.

There is no known tie break method.