For insolvency purposes in relation to a person the Bankruptcy Act 1966 defines it as:
- the spouse of the person or
- a parent or remoter lineal ancestor of the person or of the person's spouse or
- a child or remoter lineal descendant of the person or of the person's spouse or
- a brother or sister of the person or of the person's spouse or
- an uncle, aunt, nephew or niece of the person or of the person's spouse or
- the spouse of a person specified in paragraph (b), (c), (d) or (e).