(a) the aircraft owner, operator or pilot has written authorisation from CASA, based on a safety case, for the operation of the aircraft without the ADS-B transmitting equipment; or
Based on a
safety case, well Dick, what could you possibly include in a safety case?
To quote from the article
Mr Smith says this will seriously disadvantage operators, worrying it will drive some broke, while favouring big airlines.
"
Seriously disadvantage" sounds like a financial rather than a safety based argument.