paragraph 281 in volume 3, chapter 18, The Representation of the Parties
Apart from the provisions about the agent, no attempt is made in the Statute to regulate how the parties are to be represented before the Court. This is a matter which is largely the outcome of the practice of States in international arbitration. Generally speaking, the delegations representing the States (the term delegation is frequently used though it does not appear in the Statute or Rules) are composed of two elements which may, nevertheless, be partly combined in …