I think for the diploma. You do have to do a certain amount of placement hours with babies. And you have to do opening and closing hours. But other than that, I don't know of any other restrictions.

I have supervised Cert III students here at home, not sure whether you can do that with a Diploma?
I had to do 30hrs work with babies as part of my Cert III. If I didn't do that there was no way I'd be able to do a Diploma. I will be dealing with under 2's as part of my Kindy work next term anyway as they do occasional care as well.