you're thinking about this all wrong. again, DOTARS doesn't care whether a care is euro, jap-o, hindi, pakistani whatever. the rules apply the same to any manufacturer.
they are all listed somewhere here but basically you cannot import a vehicle if the same or very similar model was sold here in full volume. if the model you want to import was not sold in full volume then sure you can import it providing you can have it added to the SEVS register. To be added to the SEVS register there are certain requirements it must meet (be unique, performance level, equipment level, magazine featured etc). Then to comply it you must be a RAW or get a RAW to do it for you.
again, it's nothing to do with 1989 etc. There are 3 main ways to import any car into australia (again doesn't matter where from). Personal import. 1988 and earlier model cars and lastly SEVS.