New South Wales Consolidated ActsFor the purposes of this Act, a child is related to another person:
(a) if the child is the child, step-child, grandchild, brother, sister, step-brother, step-sister, uncle, aunt, niece or nephew (whether by consanguinity or affinity) of the other person,
(b) if the other person is the guardian of the child, or
(c) if the child has been placed in the care or custody of the other person in accordance with the provisions of the Adoption of Children Act 1965 .