I was under the impression (at least in application to NCAT) the owner can only make claims against the Owners Corporation. They cannot make claims directly against the Strata Committee or Strata Agent and must gain support and make claim against these parties by the OC making application.
One area I’ve thought much about is the implications of exercising (or not-exercising) diligently in good faith. I haven’t been about to find much caselaw around these specifics.