If I remember my ATPL nav stuff correctly the answer is...the aircraft will be under the glide path.
This answer is from a procedure design point of view but should explain it. All published alts on procedures are assuming ISA temp. The ISA temp at sea level is 15°C. Alice Springs is 1789ft AMSL and the ISA temp should be about 12°C. (ISA temp drops 2°/1000ft) The reported YBAS temp is 3°C so this makes it about 9° below ISA. Close enough to ISA-10.
As the temperature drops below ISA the altimeter will over read. ie you will be lower than the altimeter is telling you. This is because as the temp drops the air becomes more dense, thus fooling the altimeter. The altimeter thinks you are at a certain height but you are actually lower.
The altitude correction can be apllied to any altitude in the terminal area, and is indeed now a requirement in Oz. The temp corrn tables are in the front of DAP and should be used on all minimum alts in the terminal area.
Hope this explanation helps