Straight from the DEH... Vijay
If the vehicle is a one-off import for your personal use and that it is not for trade or commerce, you will not require a licence under the Department of the Environment and Heritage’s Ozone Protection and Synthetic Greenhouse Management Act 1989.
Please note, you will only be permitted to import one vehicle for the current licensing period effective from 1 January 2006 until 31st December 2007.
You will need to provide to your Customs Broker with a declaration outlining that the vehicle is a one-off import that is for personal use and is not for trade or commerce and that you will not be importing any other vehicles into Australia during the 2006-2007 licencing period.
*Vehicles in the above circumstances can contain HFCs, HCFCs, or CFCs and will not require degassing/retrofitting prior to coming into Australia.
Your customs broker will need to provide this information to the Department and or Australian Customs Service who will contact the DEH for verification and clearance.