Folks,
All IATA members, which includes almost all the airlines engaged in international airline operations (including non-scheduled) in this part of the world, have passed an IOSA audit, and the IATA deadline and grace period has long since passed, OR;
As a result, a small number of airlines have withdrawn from international operation, and/or IATA membership (mostly African and a couple in the CIS states, others scattered around) and some are limited to only where bilateral agreements permit.
I think you will find that all Australian airlines (down to some quite small one) engaged in international operations, have passed an IOSA audit, whether they are IATA members or not, because a number of national authorities make it a condition of flying to/through their area.
There are some interesting aspects of the EEC and US "rating" systems, Israel has been downgraded to Cat.2 by FAA. That being the case, the FAA consideration of the recent ICAO Australian audit will be interesting.
Tootle pip!!