5. After Article 55 of the 1987 Order (revocation of adoptions on legitimation) there shall be inserted the following Articles—
55A.—(1) The High Court may, on an application under this paragraph, by order annul a Convention adoption or a Convention adoption order on the ground that the adoption or order is contrary to public policy.
(2) The High Court may, on an application under this paragraph—
(a)order that an overseas adoption or a determination shall cease to be valid in Northern Ireland on the ground that the adoption or determination is contrary to public policy or that the authority which purported to authorise the adoption or make the determination was not competent to entertain the case;
(b)decide the extent, if any, to which a determination has been affected by a subsequent determination.
(3) Except as provided by this Article the validity of a Convention adoption, a Convention adoption order, an overseas adoption or a determination shall not be impugned in proceedings in any court in Northern Ireland.
55B.—(1) Any application for an order under Article 55A or a decision under paragraph (2)(b) of that Article shall be made in the prescribed manner and within such period, if any, as may be prescribed.
(2) No application shall be made under Article 55A(1) unless immediately before the application is made the person adopted or the adopter habitually resides in Northern Ireland or, as the case may be, both adopters habitually reside there.
(3) In deciding in pursuance of Article 55A whether such an authority as is mentioned in Article 58ZB was competent to entertain a particular case, the court shall be bound by any finding of fact made by the authority and stated by the authority to be so made for the purpose of determining whether the authority was competent to entertain the case.
(4) In Article 55A “determination” means such a determination as is mentioned in Article 58ZB.”.