abstract:In the Asylum Case (Colombia v Perú), judgement 20 November 1950 (General List No. 7 (1949–1950)), the International Court of Justice (ICJ) recognised that the scope of Article 38 of the Statute of the International Court of Justice encompassed bi-lateral and regional international customary norms as well as general customary norms, in much the same way as it encompasses bilateral and multilateral treaties.