(1) The director-general may, by written notice served on the principal officer of a private adoption agency, revoke or suspend the approval of the agency under this part—
(a) at the request of the agency; or
(b) on the ground that the agency—
(i) is no longer suitable to conduct negotiations and make arrangements with a view to the adoption of children or young people; or
(ii) has contravened a provision of this part or the regulations.
(2) For subsection (1) (b) (i), the director-general must have regard to the matters specified in section 82 (3).