Article contradicts its own title. WhatsApp is not required to open end-to-end encrypted messages.
This is an actual real quote from him : “The laws of mathematics are very commendable but the only laws that apply in Australia is the law of Australia.”
But, considering they're ignoring Troy Hunt, who is usually an advisor in these matters, its clear they just don't care. (Moreso as this appears to be a bipartisan decision).
I think this is just an effort by Turnbull to muster the conservatives in his party back around him, as lately he's been getting flogged by party members over his 'moderate' policies.