Here's some points of interest for those wishing to know ...
The full grant is available regardless of the cost of conversion or the extra cost of a new dedicated LPG vehicle. For example, the $2,000 is available for a conversion whether you pay $1,800 or pay $3,500.
Q. Is assistance available for vehicle conversions using a second hand LPG system?
A. Yes - conversions using second hand LPG units are eligible for the grant.
Q. Why isn’t a higher amount offered to cover the full (additional) costs of LPG vehicles?
Applications can be made by individuals who buy a new LPG vehicle or who have a new or used petrol or diesel vehicle converted to LPG. The Scheme will close on 30 June 2014.
A. This Scheme is designed to encourage people to convert to LPG powered vehicles. There will be a significant benefit not only to the community, but to individual users in terms of reduced running costs. It is therefore reasonable that users contribute to the cost of conversion.
I wonder what the charge will be for a relevant signitory to sign off the conversion ?
And how many cars a year I can claim for .
Maybe Ill hook up the gas then take it out for a year then hook it up again the following year to claim again

Now theres a loophole hehe might pay for rego

Easily distracted angle manipulator extrordinaire.