(1) A court having jurisdiction under this Act must not make an order under this Act (other than an order under Division 7) in relation to a child who is under the care (however described) of a person under a child welfare law unless:
(a) the order is expressed to come into effect when the child ceases to be under that care; or
(b) the order is made in proceedings relating to the child in respect of the institution or continuation of which the written consent of a child welfare officer of the relevant State or Territory has been obtained.
(2) Nothing in this Act, and no decree under this Act, affects:
(a) the jurisdiction of a court, or the power of an authority, under a child welfare law to make an order, or to take any other action, by which a child is placed under the care (however described) of a person under a child welfare law; or
(b) any such order made or action taken; or
(c) the operation of a child welfare law in relation to a child.
(3) If it appears to a court having jurisdiction under this Act that another court or an authority proposes to make an order, or to take any other action, of the kind referred to in paragraph (2)(a) in relation to a child, the first-mentioned court may adjourn any proceedings before it that relate to the child.