Tailwheel,
Cast your mind back, a little while, a pilot was threatened with prosecution by CASA because he carried two life-rafts on a trans-Pacific ferry.
The "CASA OLC Determination" was that one was mandatory, the second one was an offense, dangerous good, the subject of the threatened action against the pilot.
The additional "dangerous good" due "undeclared pressurised gasses" only came to CASA's attention because the aircraft ditched, one raft was punctured by a part of the damaged but temporally floating aircraft, so he used his backup raft.
Having floated around the Pacific, "boyd up" by dangerous good, he was finally rescued, after many hours in the water.
Isn't it just great to know that air safety "compliance" comes first with CASA.
Tootle pip!!