500 Student visa
Before you apply for this visa, you must have:
been accepted to study full-time in a registered course at an educational institution in Australia
organised appropriate welfare arrangements for the duration of your intended stay in Australia if you are under 18 years of age.

With limited exceptions, you must be enrolled in a course of study that is registered on the Commonwealth Register of Institutions and courses for Overseas for Overseas Students (CRICOS).
If you are applying from outside Australia, you must include a Confirmation of Enrolment (CoE) for each intended course of study with your visa application. A letter of offer from your education provider will not be accepted.
You do not need to provide a Confirmation of Enrolment (CoE) if you are:
sponsored by the Australian Department of Foreign Affairs and Trade – provide a letter of support
sponsored by the Australian Department of Defence – provide a letter of support
a secondary exchange student – provide an Acceptance Advice of Secondary Exchange Student (AASES) form
a postgraduate research student required to remain in Australia for marking of your thesis – provide a letter from your education provider.
If you are in Australia, you can apply with a letter of offer or a CoE but you must obtain a CoE to be granted the visa.