This hasn't been my experience in Australia. I don't believe this law will make a difference at all either. The reason is that if you refuse to do it, then this will come up during performance reviews as something else. "More responsive" or "available for your teammates" or "more of a team player" etc. Of course the manager won't be asking you in any direct way or in written form to be available outside working hours. The incentive system will just be changed to make it your choice to do so.
Conducting interviews over the last year or so had people telling me of their stories. The labor protection laws didn't seem effective except for clear cut cases and even then you'd probably just get a bit of money and you would've ruined your reputation of getting hired ever again because you're a trouble maker.
The law won't make a difference for us, but it will probably make a difference to the super-market employees being phoned at 6am and asked to take on an extra shift today.
Conducting interviews over the last year or so had people telling me of their stories. The labor protection laws didn't seem effective except for clear cut cases and even then you'd probably just get a bit of money and you would've ruined your reputation of getting hired ever again because you're a trouble maker.