In typical fashion, one country takes the lead (also happens with IP rights ratchets), and if/when it pans out, the others "follow that example" / harmonize / pick your particular bureaucratic mechanism and terminology.
There is no need to "pan it out" to other countries. If the law passes in Australia then other 5 Eyes countries can send their data to us, have it decrypted, and then have it sent back to the original country (this is one of the primary things that 5 Eyes exists for -- to allow for this sort of bullshit). Which means that even if such tactics are not legal in your home country, they can outsource the reprehensible shit to us.
