Not as far as I know (but then again, I'm travelling that much for work that I could have missed it
).
Under the existing guidelines (and for naturally aspirated):
Up to 1100kg and originally a 4-cylinder/rotary: original vehicle mass x 3 = max vehicle capacity in cc.
More than 1100kg, or more than 4 cylinders, and monocoque: original vehicle mass (kg) x 4.82 = max vehicle capacity in cc.
More than 1100kg, or more than 4 cylinders, and chassis: original vehicle mass (kg) x 5.46 = max vehicle capacity in cc.
The NSW government has been talking of introducing the National Code of Practice, but has not yet. Under the NCOP (and for naturally aspirated):
Up to 800kg: original vehicle mass (kg) x 3 = max vehicle capacity in cc.
800-1100kg: original vehicle mass (kg) x 4 = max vehicle capacity in cc.
More than 1100kg: original vehicle mass (kg) x 5 = max vehicle capacity in cc.
Is this where the 1100kg came from?
Cheers,
Harv.