From 1 July 2008
Your ‘spouse’ includes another person (whether of the same or opposite sex) who:
> you are ‘in a relationship with’ that is registered under a prescribed state or territory law (Note 1)
>although not legally married to you, lives with you on a genuine domestic basis in a relationship as a couple
(Note 1) You are not ‘in a relationship’ if you live separately and apart on a permanent basis, even if you are legally married.
Refer to the link below for the amended definition of spouse and child from 1 July 2008 which includes same sex relationships.
Before 1 July 2008
A ‘spouse’ included another person who, although not legally married to you, lived with you on a bona fide domestic basis as your husband or wife, but did not include:
> a person who lived separately and apart from you on a permanent basis.
> same sex relationships