Keepin left.... is it a law???

[cuz]

Hi, I'm not sure on this so I thought I'd get you fellas to help me out.

I believe that one of the most frustrating things on the roads today is the blatant inability of people to keep left. Now, I'm talking about drivers in the right lane of a multi laned road. Be it a freway or other major arterial. In most other situations, if they are doing the speed limit, too bad for me, I just have to grin and bear it. I spend a lot of time on melbournes roads and freeways and it really is annoying to be constantly held up by drivers in the right lane. Granted that some of them aren't really paying attention to their mirrors and I've crept up, but most are just plodding along either just under or on the speed limit. Move left people and let the driver behind go past.

But, I'm wondering if its against the law? I'm from NZ and not only was it against the road code but its what my Dad emphasied alot when I was learning to drive, Keep left! Even to this day, I get anxious when I'm in the right lane and another motorist is behind me. I do everything possible to quickly but safely move left to let them thru. However, I seem to be one of only a few on the roads these days. Having never seen the Aust. road code I don't know the legalities of this problem.


So, my question to you is:
Is driving in the right lane and holding up traffic illegal?

Not that theres much I can do about it, but it would be nice to know.
Thanks,
Cuz :