This Subdivision has 2 principles for defining family relationships.

The first principle is to treat an unmarried couple (whether of the same sex or different sexes) in the same way as a married couple if:

  (a)   their relationship is registered under particular State or Territory laws; or

  (b)   they live together on a genuine domestic basis.

The second principle is to treat anyone who is defined to be an individual's child in the same way as the individual's natural child would be treated.

Both principles extend to tracing other family relationships, including beyond couples and children and their parents.