paragraph 312A in volume 3, chapter 20, The Written Proceedings and Related Matters
Article 45, para-graph 2, for cases introduced by application and Article 46, paragraph 2, for cases introduced by special agreement, both indicate that in principle there should be one round of written pleadings, further rounds being dependent on the agreement of the parties unless the Court should decide on a further round proprio motu. In cases introduced by special agreement, this can lead to three rounds of written pleadings, as occurred in the Frontier Dispute (Benin/Niger).
Wi…