I have an email from the Law faculty when I enquired, here it is:
Dear Jonathan,
Thank you for your interest in the Graduate Law program at the Faculty of Law, University of Sydney. This program is designed for students who already hold a non-law degree in another field and wish to gain the academic qualifications to be a legal practitioner.
I assume that by "Diploma in Law" you mean the Diploma of Law run by the Law Extension Committee? If you completed this Diploma you would not need to undertake a Grad Law program as you would have a Law degree.
Full information on the Graduate Law Program may be found at
http://heifer.ucc.usyd.edu.au/law/FMPro?-DB=law.fp5&-FORMAT=h00.htm&code=h01a01&Max=1&-Find This is a 3 year full-time program.
All applications for Graduate Law are processed by the Universities Admissions Centre (UAC). Applications will be open from August each year for courses starting in March the following year. Please visit UAC's website for more details at
www.uac.edu.au or purchase the UAC Guide from a newsagent.
Competition for places is keen and admission is based on 25% UAI (or equivalent) and 75% tertiary grade point average. Success at gaining entry depends on the quality of the applicants you are competing against in any given year. Experience shows that a UAI of 90 and a grade point average in the Credit range are necessary for a competitive application.
The Graduate Law program is a HECS liable program which costs around $6200 per year. Full-fee paying entry costs around $18,000 per year.
Details of scholarships can be found at
http://heifer.ucc.usyd.edu.au/law/FMPro?-DB=law.fp5&-FORMAT=b00.htm&code=b03&Max=1&-Find
The online printable Graduate Law brochure can be found at
http://www.law.usyd.edu.au/InformationPack/index.htm
Please let me know if you have any further queries.