Section 66D — Family Law Act 1975: Principles—when step-parents have a duty to maintain

(1) The step-parent of a child has, subject to this Division, the duty of maintaining a child if, and only if, a court, by order under section 66M, determines that it is proper for the step-parent to have that duty. (2) Any duty of a step-parent to maintain a step-child: (a) is a secondary duty subject to the primary duty of the parents of the child to maintain the child; and (b) does not derogate from the primary duty of the parents to maintain the child.