Where—
(a) an authority of a Convention country (other than the United Kingdom) having power under the law of that country—
(i) to authorise, or review the authorisation of, a Convention adoption; or
(ii) to give or review a decision revoking or annulling such an adoption or a Convention adoption order; or
(b) an authority of any of the Channel Islands, the Isle of Man or any colony having power under the law of that territory—
(i) to authorise, or review the authorisation of, a Convention adoption or an adoption effected in that territory; or
(ii) to give or review a decision revoking or annulling such an adoption or a Convention adoption order,
makes a determination in the exercise of that power, then, subject to section 53 and any subsequent determination having effect under this subsection, the determination shall have effect in England and Wales for the purpose of effecting, confirming or terminating the adoption in question or confirming its termination as the case may be.
Subsections (2) to (4) of section 12 shall apply in relation to an order freeing a child for adoption (other than an order under section 18) as if it were an adoption order; and, on the revocation in Scotland or Northern Ireland of an order freeing a child for adoption, subsections (3) and (3A) of section 20 shall apply as if the order had been revoked under that section.
Sections 12(3) and (4) and 49 apply in relation to a child who is the subject of an order which is similar to an order under section 55 and is made (whether before or after this Act has effect) in Scotland, Northern Ireland, the Isle of Man or any of the Channel Islands, as they apply in relation to a child who is the subject of an adoption order.