Article 15
1. A request by a party for the selection by the Tribunal of scientific or technical experts under article 289 of the Convention shall, as a general rule, be made not later than the closure of the written proceedings. The Tribunal may consider a later request made prior to the closure of the oral proceedings, if appropriate in the circumstances of the case.
2. When the Tribunal decides to select experts, at the request of a party or proprio motu, it shall select such experts upon the proposal of the President of the Tribunal, who shall consult the parties before making such a proposal.
3. Experts shall be independent and enjoy the highest reputation for fairness, competence and integrity. An expert in a field mentioned in Annex VIII, article 2, to the Convention shall be chosen preferably from the relevant list prepared in accordance with that
annex.
4. This article applies mutatis mutandis to any chamber and its President.
5. Before entering upon their duties, such experts shall make the following solemn declaration at a public sitting:
“I solemnly declare that I will perform my duties as an expert honourably, impartially
and conscientiously and that I will faithfully observe all the provisions of the Statute
and of the Rules of the Tribunal”.