(a) Upon motion of a child, a child's parent or custodian or the department alleging a change of circumstances requiring a different disposition, the court shall conduct a hearing pursuant to section two of this article and may modify a dispositional order if the court finds by clear and convincing evidence a material change of circumstances and that such modification is in the child's best interests: Provided, That a dispositional order pursuant to subdivision (6), subsection (a) of section five shall not be modified after the child has been adopted, except as provided in subsections (b) and (c) of this section. Adequate and timely notice of any motion for modification shall be given to the child's counsel, counsel for the child's parent or custodian, the department and any person entitled to notice and the right to be heard. The circuit court of origin has exclusive jurisdiction over placement of the child, and such placement shall not be disrupted or delayed by any administrative process of the department.
(b) If the child is removed or relinquished from an adoptive home or other permanent placement after the case has been dismissed, any party with notice thereof and the receiving agency shall promptly report the matter to the circuit court of origin, the department and the child's counsel, and the court shall schedule a permanency hearing within sixty days of the report to the circuit court, with notice given to any appropriate parties and persons entitled to notice and the right to be heard. The department shall convene a multidisciplinary treatment team meeting within thirty days of the receipt of notice of permanent placement disruption.
(c) If a child has not been adopted, the child or department may move the court to place the child with a parent or custodian whose rights have been terminated and/or restore such parent's or guardian's rights. Under these circumstances, the court may order such placement and/or restoration of a parent's or guardian's rights if it finds by clear and convincing evidence a material change of circumstances and that such placement and/or restoration is in the child's best interests.