By: Nigel Bankes
Decision commented on: Conciliation Commission, Between the Democratic Republic of Timor-Leste and the Commonwealth of Australia: Decision on Australia’s Objections to Competence, 19 September 2016 (Registry, the Permanent Court of Arbitration)
Background
Part XV of the Law of the Sea Convention (LOSC or Convention) provides, inter alia, for “compulsory conciliation” with respect to disputes concerning the interpretation or application of the Convention in a number of instances. This particular dispute concerns Articles 74, 83 and 298 of the Convention. Articles 74 and 83 are the well-known provisions dealing with the delimitation of the exclusive economic zone and the continental shelf where there are overlapping entitlements as between adjacent or opposite states. Timor-Leste and Australia are opposite states separated by the Timor Sea which is approximately 300 NM wide. On the same day that Timor-Leste regained its independence (20 May 2002) the two states concluded the Timor Sea Treaty which established a Joint Petroleum Development Area pending delimitation of the boundary. Further negotiations between the two states led to the adoption (2006) of the Treaty on Certain Maritime Arrangements in the Timor Sea (CMATS). In separate arbitral proceedings Timor-Leste is contesting the validity of CMATS. The two states have yet to agree on a permanent maritime boundary.