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

Pink plate block

Wins Losses Net
Hoops
#
Werner Borkhardt (Byron Bay) 2 1 +5 =1
Georgina Carnegie (Royal Sydney Golf Club) 2 1 +1 =1
Bob Berry (Chatswood) 1 2 -3 =3
Candy Forrester (Cooks River) 1 2 -3 =3

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

There is no known tie break method.