Entry to undergraduate law programs
Generally the basic requirement is that you have completed your secondary education. You will generally need to have the equivalent from your country of the Australian Year 12 qualification. Each institution will tell you what they need from you to prove that you have that qualification.
Sometimes you will not need to have completed secondary education if you have had significant work experience. This will depend on each university’s rules and you will need to enquire of the relevant law school if you are in this situation.
You will almost always need, as well, to show that you have English language proficiency to an acceptable level.
Every law school’s website has a section which will give you this information. You will find there who to contact at the law school or schools in which you are interested. Check with them what their requirements will be for you.