Originally Posted by
danger
Okay. Then what about booking a quick domestic sector to kick things off, say BNE-SYD on 21 May 2009, then not taking the next leg (eg. SYD-SIN) until 1 December 2009)?...
Nope. The restriction affects the first international flight and all preceding flights.
Edited to add: Even if that worked, however, and I concede that it could, there's the question of the validity of the ticket after first flight. The longer you take to restart your itinerary after that first quick flight the shorter the time you will have to complete the trip.