21.—(1) The following documents shall be attached to an application for an order under section 18, that is to say:

(a) a duly certified copy of the judgment to which the application relates,

(b) in the case of a judgment that was given in default of appearance or defence, a duly certified copy of the document that establishes that the party in default was served with the document instituting the proceedings to which the said judgment relates or with an equivalent document, and

(c) if the High Court so requires, a translation of the documents specified in paragraphs (a) and (b) certified as being a correct translation thereof by a person who is competent to so certify.

(2) For the purposes of this section—

(a) a document purporting to be a copy of a judgment shall be deemed to be duly certified if it purports—

(i) to bear the seal of the convention court that gave it, or

(ii) to be certified by any person in his or her capacity as a judge or officer of that court as being a true copy of the judgment, and

(b) a document purporting to be a copy of a document specified in subsection (1)(b) shall be deemed to be duly certified if it purports to be certified by a person who in relation to the convention court concerned performs functions the same as or similar to those performed in relation to a court in the State by the registrar or clerk thereof, as being a true copy of such document.