The different contract options determine the dates of your accommodation. There are a few factors that determine which contract option you'll need; for example:
Some courses (eg Medicine) will require you to be on campus for longer periods than others. Commencing or completing your degree part-way through the year. Please be aware that all contracts are subject to availability.
If you're unsure, you can consult the Course and Unit Catalogue for the requirements of your course, or talk to the UNE Future Students Team.