Hi PPSS,
It used to be fairly straight forward (didn't everything)! Just produce a record of your simulator training and evidence of the rating on your foreign licence, pay a fee, $10 the first time I did it and $75 the last time, around 10 years ago. The first time it was on the spot, over the counter at a CASA office, next one took about two weeks and in recent times people have told me that they have been quoted 55 working days! (Ah progress)
I presume by CASA you mean the CLARC office? If not, try
https://www.casa.gov.au/about-us/sta...tration-centre They used to be very helpful!