It doesn't matter what terms and conditions any Australian body or any Australian business, agency or organization includes in their terms of sales, they do not override Australian Consumer Law. No policy, wherever written regardless of who writes it (even the govt itself) can negate or circumvent Australian Consumer Law.

To go through this link, scroll down a bit and open up the PDF booklet provided under the picture of the phone which explains ability and restrictions relating to retuns. Australian Consumer Law

This is a link about refunds and returns from Consumer Affairs Victoria, (CAV) however, their information and advice provided relates to and is based on Australian Consumer Law, and thus can be used by anybody throughout Australia .

Same CAV website, but specifically relating to online purchases.