5.—(1) For the purposes of proceedings relating to the Convention a document, duly authenticated, which purports to be a copy of a maintenance decision given by a court in a Contracting State shall without further proof be deemed to be a true copy, unless the contrary is shown.
(2) A document purporting to be a copy of a maintenance decision given by a court in a Contracting State is duly authenticated for the purposes of this paragraph if it purports—
(a)to bear the seal of that court; or
(b)to be certified by any person in that person’s capacity as a judge or officer of that court to be a true copy of a maintenance decision given by that court.
(3) Nothing in this paragraph shall prejudice the admission in evidence of any document which is admissible apart from this paragraph.