Thanks Laith for the links.
After a quick read, and correct me if I've got this wrong, it would seem that the National Code of Practice (VSB14) is the more lenient of the two documents, and leaves avenues for people with higher lifts to still use their vehicle providing they have undergone the certification process. On quickly reading through this document, it left me quietly confident that we could live with these regulation, albeit with a little extra expense for certification.
Now the VSI50 document by the state government seems to take the VSB14 regulations one step further and eliminates any chances of vehicles with higher lifts ever being allowed to be registered or used on the roads. It lists numerous avenues and documentation that people must obtain even for very mild lifts, and to me will create a mine field of red tape for owners of these vehicles also.
The exemption clause for higher lifts (ride height increased by up to 100mm total suspension and tyres) and the need to join a 4x4 club or attain some sort of accreditation would be a bonus for these clubs and accreditors financially, but as has been spoken about on this forum a few times previously, the cridibility of these clubs etc., are not always the best for driving practices.
After a quick read, the National approach looks to be much better than the state level approach to this issue.