(1) For the purposes of this Act, if one person is the child of another person because of the definition of child in section 5CA, relationships traced to or through that person are to be determined on the basis that the person is the child of the other person.
(2) For the purposes of this Act, the members of a person's family and relatives of a person are taken to include the following:
(a) a de facto partner of the person;
(b) someone who is the child of the person, or of whom the person is the child, because of the definition of child in section 5CA;
(c) anyone else who would be a member of the person's family or a relative of the person if someone mentioned in paragraph (a) or (b) is taken to be a member of the person's family or a relative of the person.
This does not limit who is a member of a person's family or relative of a person.