Chainsaws in Australia

I was recently made aware that there are laws governing the use of chainsaws and, apparently, you're supposed to be licensed to do so.

Can anyone comment on this law? Does it apply to all chainsaws or is there a differentiation between various sizes or between gas and electric, etc?

Is this law enforced? How difficult is it to get the license?

I got some killer Macadamia that I need to put the chop on soon so I can get it drying.

I'm in QLD, by the way.

Thanks a lot in advance.

Cheers,
Luke