Thanks for the info fellas.
I believe that SYD does not meet the requirements for CAT III due to the proximity of the taxiways to the runway. From what I understand is that they are too close.
Good to see the GLS in operation in MEL too. I was told that RW 34 can't have one due to airspace to the south and confliction with traffic OCTA. Not sure on the criteria that is applied but they still have other approaches commencing with around a ten mile final for RW 34.