Leaking the report would “void the evidence”? Don’t let CASA (or your neighbour) know what drugs you’re on. This is adminitrative law torture, not a criminal prosecution.
It’s not CASA being “above the law”. It’s scaremongering zealots using the fear of tragedies like Germanwings to justify an individual pilot’s rights to natural justice and fact-based decisions to be overridden by the mere invocation of “safety”.