Can anyone please give a clarification on initial entry , time span to stay in OZ. When we make initial entry is there any specific time period, we have to stay in oz. or can we stay for couple of days and go back, just to validate the visa.
There's no time limit on how long you have to say in Australia on your validation visit. If you wanted to you could walk through customs and get your passport stamped and then get straight back on a plane to go home!