Keep option 1, or even reduce the restriction to 10 years like the UK. This would force the australian car industry to start making better cars. How much excited was ford when they release their 32valve v8 2 years ago.... Congratulations guys you've caught up to '91 toyota technology! If emissions are a real concern all need be done is enforce yearly road worthy checkups and put an emission test on the list of things that must be done. This would get all the bombs off the road making things safer for everyone.