The parties undertake to supply the Commission of Inquiry, as fully as they may think possible, with all means and facilities necessary to enable it to become completely acquainted with, and to accurately understand, the facts in question.

They undertake to make use of the means at their disposal, under their municipal law, to insure the appearance of the witnesses or experts who are in their territory and have been summoned before the Commission.

If the witnesses or experts are unable to appear before the Commission, the parties will arrange for their evidence to be taken before the qualified officials of their own country.