soloflyer, The AVID is CASA's minimum security requirement to be able to fly as PIC. It isn't much use these days as more and more airports are getting RPT services and therefore become designated as being "Security Controlled" which requires an ASIC.
I'm stall waiting for the b@stards from OTS to deliver on the white paper promise of full two year validity and transferability of the security clearance for an ASIC. They pulled out all stops to change the regs and clear corkscrews and knitting needles but we are still being right royally rogered. I guess winos and grannys have more clout than pilots.