Mb, I have no reason to doubt you, but the advise we were given from the Oz Embassy and the website indicates;
A Crew Travel Authority (subclass 942) is an electronic immigration record against which the legal authority of international airline crew members to enter Australia can be checked electronically through the Advance Passenger Processing system before their flight to Australia. Crew members travel to and enter Australia on their Special Purpose visas.
International airline flights include commercial passenger flights, chartered passenger flights, and freight or cargo flights.
Crew members with Australian or New Zealand passports do not require Crew Travel Authorities.
People operating private flights into Australia are not eligible to register for a Crew Travel Authority (subclass 942).
https://www.border.gov.au/Trav/Visa-1/942-
However, I am no expert in this field.
ADG