As per NCR 144, the onus is on the competitor to understand and comply with the regulations of the event/s that they wish to compete in.
All National Regulations can be found on the CAMS Online Manual of Motor Sport. The Manual covers all the technical requirements for any given category.
The sporting regulations for CAMS Australian Championships, Australian Series, Series and Nationals (Single Events) can be found in the CAMS Online Manual- Sporting Regulations. Some of these regulations will also contain technical regulations which may differ from the category technical regulations.
Most event organisers will publish additional regulations for their specific event. They are available from event organisers.
Some states may publish additional state specific regulations