In any proceedings under this Part of this Act a decision of an authority outside the United Kingdom may be proved by a duly authenticated copy of the decision; and any document purporting to be such a copy shall be deemed to be a true copy unless the contrary is shown.

For the purposes of subsection (1) above a copy is duly authenticated if it bears the seal, or is signed by a judge or officer, of the authority in question.

In any proceedings under this Part of this Act any such document as is mentioned in Article 13 of the Convention, or a certified copy of any such document, shall be sufficient evidence of anything stated in it.