They're not allowed to ask for a "systemic" change, which I think is how they're trying to get around the impossibility of an app providing stuff it doesn't hav

They're not allowed to ask for a "systemic" change, which I think is how they're trying to get around the impossibility of an app providing stuff it doesn't have. They can ask/demand that whatsapp delivers an app update that only targets a particular person or persons, with some sort of backdoor, but not one that is a backdoor for all users. Of course, there's a whole cost thing there as well as whether an overseas corporation is required to co-operate with AU law enforcement. So theoretically, they could say "Whatsapp, give us a backdoored app. Telstra, push this app to these phones." Or course, Whatsapp could argue that releasing a backdoored app is creating a "systemic vulnerability" which is specifically carved out of the requirements to co-operate.