13.3.1 Option 1 on page 7 of the VicRoads guide:
"This option allows a combination of suspension lift and the fitting of larger diameter tyres that results in a total lift of up to 75 mm without the need for the testing and certification normally required by VSB 14 for lifts above 50 mm provided the following requirements are met."
What it does call into question though is fitting combinations of springs and shocks that are not part of a matched kit from a single manufacturer......
Tip tip tip......tap tap tap....