So if I already have a qualification, I can't do an apprenticeship?
You can't do an apprenticeship in the same qualification. This doesn't mean you can't do an apprenticeship or traineeship at all!
You can do an apprenticeship with a qualification at a higher level. For example, if you have done a Certificate II in Business, you could do an apprenticeship with a Certificate III in Business. You might be able to get recognition for prior learning towards your apprenticeship or traineeship qualification, and do it more quickly.
You can also do an apprenticeship or traineeship in a different area. For example, if you have done a Certificate III in Business, but now want to become an Electrician, that is fine!
The main this is, you can't do the same qualification again.