Maybe a chat with the board, if no suitable response the maybe a chat with CASA? Without making it a threat, indicate your planned approach should no suitable response be forthcoming.
The only long term solution to these problems is to establish the process I suggested in an earlier post.
Don't lose sight that this is all about accountability, sound processes leading to improving safety.
Increasing regulations and introducing restrictions does not improve safety. Effective education improves safety.
Education may involve the written word, mass presentations, online training, 1:1 training, demonstrations and many other forms. There is little education being delivered by the organisation.