"AEMO is also less-than-thrilled about how much it didn't know regarding the ride-through settings – because vendors tried to keep the information to themselves: “AEMO will consider in the longer term the most appropriate level of disclosure and verification for settings embedded in proprietary software control systems”. "
Disclosure is easy, you ask the vendor to tell you. However, you need the skill and experience to ask the vendor the right questions and to let them know what level of detail you want.
Verification is difficult because you need to set up system level tests and that takes real skill and experience and quite a bit of time and money.
Did AEMO go through all this before system acceptance?