6.-(1) Subject to the provisions of this Part an assumption under section 4 shall continue in force until the child with respect to whom it was made attains the age of eighteen.
(2) An assumption under section 4 may be rescinded by the Director if it appears to him that the rescinding of the assumption will be for the benefit of the child.
(3) On complaint being made-
(a) in the case of an assumption made by virtue of paragraph (a) of subsection (1) of section 4 by a person claiming to be a parent or guardian of the child;
(b) in the case of an assumption made by virtue of paragraph (b) thereof by the person on whose account the assumption was required,
the Court where the complainant resides, if satisfied that there was no ground for the making of the assumption or that the assumption should in the interest of the child be determined, may by order determine the assumption and the assumption shall thereupon cease to have effect:
Provided that the Court may, in lieu of determining the assumption, order that either for a fixed period or until the Director so determines, the Director shall allow the care of the child to be taken over by, and the child to be under the control of, the complainant.