Here is a link to files for download on the new NCOP (National Code of practice) for vehicle modification.
http://www.dotars.gov.au/roads/safety/b ... _ncop.aspx
Also, here is a link to VicRoads for vehicle standards and regulations including a modification guide
http://www.vicroads.vic.gov.au/Home/Rul ... formation/
Here is where you will find a list of VASS signatory Engineers
http://www.vicroads.vic.gov.au/Home/Roa ... esVASS.htm
Vehicle Modification Regulations
Moderator: Committee