(1) A parenting order must not be made in relation to a child who:
(a) is 18 or over; or
(b) is or has been married; or
(c) is in a de facto relationship.
(2) A parenting order in relation to a child stops being in force if the child turns 18, marries or enters into a de facto relationship.
(3) A court having jurisdiction under this Part may make a declaration to the effect that the child is in, or has entered into, a de facto relationship.
(4) A declaration under subsection (3) has effect for the purposes of this Act but does not have effect for any other purpose (including, for example, other laws of the Commonwealth or laws of the States and Territories).