I see today that CAMS have amended the requirements for Extinguishers in race cars in race events.

http://www.camsmanual.com.au/pdf/10_...e_H_2012-2.pdf

For those who considered the previous requirement of having to service or buy a new hand held 900 gm extinguisher every two years silly, your wishes have been granted.

You can now race extinguisher free, and that weight saving of 900 grams of extinguisher powder will sure help.