Depends where you are. In the ACT the EC code of conduct is part of the Act. Default rule require compliance with ACT law. So, you could go to the Tribunal seeking an order for compliance.
Elsewhere, if the code of conduct were adopted as a by-law, then you are probably in the same situation.
In any case, whatever behaviour is causing a breach of a code of conduct is probably bad enough that you could address that directly.
You could talk to neighbours and encourage them to vote for someone different at the next AGM.
You might be able to put a specific motion that refers to the inappropriate behaviour. Best to keep it civil, cool and unemotive.
Care to be more specific what the problem is?