To add to what Modena has stated:
In NSW you only need the IM240 test to show emissions compliance equivalent to 1997 levels or newer. It is also free in NSW at two RMS run locations.
If you want to talk to a NSW engineer about the process, there's a list here:
http://www.rta.nsw.gov.au/registrati...ulletin_01.pdf
I am on this list, and have certified numerous ICVs in the past 12 months. If you would like to talk about the ins-and-outs with a certifier, feel free to give me a call. I'm an enthusiast first, so I don't charge for phone conversations - I like to meet new people and see new builds.
Treeve