there is the Australian visual approach criteria. About the one bit that is simple, if there is an instrument approach for the runway, a aircraft on a visual approach follows the IFR G/A, unless instructed otherwise.
Exactly, AUS, like most countries (except the US) use VFR 90% of the time, following the same IFR procedures. So when you have to GA, the instructions are already there, straight ahead to 4000, await ATC.
In NZ, Queensland, you just land, no matter what is going on!