Hi Dave
Have you been granted tir vsas and have they been validated by means of the whole family making at least a short trip to Oz since the
PR visas were granted?? Your visa grant letter and the visa label itself both state the date by which the Initial Entry to Oz must be made. If you have not yet validated, then make sure that you do so before the deadling expires.
If you have already validated it then you cab breathe for a while, as Kaye has said.
Cheers
Gill