[caf]

"I think we've got to take a common position [among the five eyes] on the extent of the legally imposed obligations on the device-makers and the social media companies to co-operate," Senator Brandis said.

He's got to realise that any such agreement will inevitably end up being the lowest common denominator of what each of the nations think they can reasonably get away with legislating, which in this case probably means that US (with the strongest device-maker and social-network lobby) will drive what is possible.