from memory you need to be a sergeant or above with a trade that the aussies need. There were pommy corporals on my basic with me, they did not have to finish their basic just had to do a qual on the steyr.
all the info is on this site though, also be worth trying the Kiwi army, they have lots of Brits in them. Aussies love the pommy soldiers, the army tries to distance themselves from the Brits, but the soldiers themselves have a lot of respect for UK soldiers, and they have a lot of the same techniques etc.
yeah, they use the steyr. I have not had a massive amount of experience with it. But they all seem be happy with its reliability etc, and I have had no problems except when firing blanks, stoppages. Very easy to strip etc and pretty accurate.
1. Apply to transfer through the High Commision, I understand that there are 70 visas a year 35 for officers 35 for OR's which really means SNCO's unless you have something very special to offer (your botty love isn't that special.......so I'm told).
2. Emigate, this can take upto 2 years and you need to gain the required points or marry an Aussie. Either can be expensive. Then you can apply to join the military and wait between 6-18 months for "paperwork".
I went version 2 and a mate of mine went version 1 (without botty love).
To answer the origional question between 18 and 55, yes there are 55 year olds who try, I was on interviews with one, just a more in depth medical - funny old thing.
Hope this helps anything else I'll try to be more useful.
differences between Kiwi and Aussie army? Where do I start?
1. Kiwis are better at everything (esp rugby...and cricket)
2. Kiwis have cooler looking camo (and more effective)
3. kiwis have a better sas then aussies (NZSAS kicks SASR ass anyday)
4. Kiwis are good at making up terrible lists (a lot like this one)
5. Kiwis hardly get to see any action, other then in SAS
and thats about all I can think of...Kiwi for life
Oh and, you can get put into the army after likea 5 minutes internet survey...its really awesome. And maori are the best...we were awesome as trackers and "hearts and minds" lads in Malaysia