Jurisdiction and Applicable Law in the Settlement of Marine Environmental Disputes under UNCLOS

Part XII of the United Nations Convention on the Law of the Sea (UNCLOS) on the protection and preservation of the marine environment contains provisions that are worded in a general manner. As “the problems of ocean space are closely interrelated and need to be considered as a whole”, these provisions need to be interpreted in harmony with the wider corpus of international law. However, when marine environmental disputes are brought before the UNCLOS dispute settlement bodies, their jurisdiction is limited to disputes arising under UNCLOS. The tribunals, therefore, have to navigate between deciding disputes in a hollistic manner and remaining within their jurisdictional limits. This article discusses the techniques used by UNCLOS tribunals to resort to other sources of international law when settling marine environmental disputes. It will then assess whether, in doing so, the tribunals have remained within their jurisdictional parameters and the wider implications of this practice.