[Graham]

Class A constructed cars  - will include Brass & Wire, Nickel chrome (PP) or metal chassis which are based on Resin moulded bodies fitted with Class A motors
Class B constructed cars - will include Brass & Wire, Nickel chrome (PP) or metal chassis which are based on Resin moulded bodies fitted with Class B motors
Class C constructed cars - will include Brass & Wire, Nickel chrome (PP) or metal chassis which are based on Plastic moulded bodies.

So in terms of Events
Event 1- Permits Class A,B and now C constructed cars
Event 2 - Permits Class A,B & C constructed cars
Event 3 - Permits Class A,B & C constructed cars
Event 4 - Permits only Class A & Class B constructed cars


So sorry for the confusion, the change was to allow some of the slower resin built models to enter Class A, but also to classify Plastic moulded bodies fitted with metal chassis in the higher performance category Class C