The Secretary must not approve the entering into of a long-term child care agreement unless the Secretary is satisfied that—
(a) the agreement is in the best interests of the child; and
(b) there are no alternative means available that would enable the parent of the child to resume the care of the child; and
(c) the wishes of the child have, having regard to the age and understanding of the child, been taken into account in making the agreement; and
(d) the agreement provides for the parent of the child to have an on-going involvement with the child in the terms specified in the agreement.