You need to get the various associations togehter not to rewrtie the rules, but to rewrite the regulators charter with an agenda to break it up.
THere needs to be a disconnection of "rule writing" and "enforcing". There needs to be a physical disconnect and an intelllectual or logical as well as statutory disconnect.
The reason for that is because of the powers CASA awards itself (I know its Parliament officially, but lets get real here). Those powers involve both criminal and economic sanctions and very wide latitude in their application. There is no administrative check on the exercise of these powers as there are in other departments and there needs to be one.
The splitting of CASA would thus require the rules to be much clearer, since otherwise the enforcers can't enforce. The associations can then fight with CASAs successor tooth and claw over rules - at least they have a clear target separate from the enforcers. And the rule makers have to write their rules with an eye on the cost and efficiency of enforcing them.
This is not rocket science, its public administration 101 - read your Weber.
Shirley the associations know this?