One question I have over all this is - my understanding of carnet cards was to make sure that the local petrol heads didn't pop down and fill their cards with high octane fuel. How is this prevented under the new system? Are they only installed at 'security controlled' airports so the revheads need to show an ASIC?
Don't think so, Carnet cards have been in existence since long before card swipe facilities came into being. They were more like the Myer, David Jones, John Martin cards your mother used to use to buy your school clothes, only really intended to be something that could imprint your account details on a sales docket.