The court may vary or discharge a special guardianship order on the application of—
In any family proceedings in which a question arises with respect to the welfare of a child with respect to whom a special guardianship order is in force, the court may also vary or discharge the special guardianship order if it considers that the order should be varied or discharged, even though no application has been made under subsection (1).
The following must obtain the leave of the court before making an application under subsection (1)—
Where the person applying for leave to make an application under subsection (1) is the child, the court may only grant leave if it is satisfied that he has sufficient understanding to make the proposed application under subsection (1).
The court may not grant leave to a person falling within subsection (3)(b)(c) or (d) unless it is satisfied that there has been a significant change in circumstances since the making of the special guardianship order.