Thanks to the moderastors and others for the advice on the 90 day reporting procedures. Before travelling to Australia on 12 Nov, I was due for my 90 day report on 29 Dec. I arrived back on 19 Nov and after checking the 90 day reporting page, I reset my counter and it is now due in Feb. Saves me a trip to the Immigration Office. Thanks again.
TLDR : Answer Summary
An expat shares their experience of the 90-day reporting procedure after traveling to Australia. They reset their reporting count upon return, avoiding an unnecessary trip to the Immigration Office. Other users provided clarification on the counting of days and inquired about notifying immigration upon arrival.