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Maritime Space: Maritime Zones and Maritime Delimitation

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INTRODUCTION

1.     In 1994, more than ten years since the adoption of the United Nations Convention on the Law of the Sea of 10 December 1982, the Division for Ocean Affairs and the Law of the Sea issued a study entitled The Law of the Sea: Practice of States at the time of entry into force of the United Nations Convention on the Law of the Sea(United Nations publication, Sales No. E.94.V.13).

2.     The study showed that even before the entry into force of the Convention, on 16 November 1994, the principles and rules embodied in the Convention have exerted considerable impact on the practice of States, regardless whether a State signed the Convention, ratified it or acceded to it. It presented main trends and highlights of the practice of States as well as the major global developments, which transcended State practice at the national or regional levels. The study was a complement to another series of Law of the Sea publications focusing on State practice, in particular on national legislation and delimitation agreements. Among those publications were the following: Baselines - National Legislation with Illustrative Maps(United Nations publication, Sales No. E.89.V.10); National Legislation on Territorial Sea, the Right of Innocent Passage and the Contiguous Zone(United Nations publication, Sales No. E.95.V.7); National Legislation on the Exclusive Economic Zone(United Nations publication, Sales No. E.93.V.10); National Legislation on the Continental Shelf(United Nations publication, Sales No. E.89.V.5); Multilateral Treaties - A Reference Guide to Multilateral Treaties and Other International Instruments Related to the United Nations Convention on the Law of the Sea(Revised and updated as of 31 December 1996) (United Nations publication, Sales No. E.94.V.13); Practice of Archipelagic States(United Nations publication, Sales No. E.92.V.3); Maritime Boundary Agreements 1970/84(United Nations publication, Sales No. E.87.V.12); Maritime Boundary Agreements 1942/69(United Nations publication, Sales No. E.91.V.11); Maritime Boundary Agreements1985/91(United Nations publication, Sales No. E.92.V.2); and Current Developments in State Practice(United Nations publication, Sales No. E.87.V.3); Current Developments in State Practice No. II(United Nations publication, Sales No. E.89.V.7); Current Developments in State Practice No. III(United Nations publication, Sales No. E.92.V.13); and Current Developments in State Practice No. IV(United Nations publication, Sales No. E.95.V.10).

3.     The present Internet publication represents a continuous effort by the Division to provide the most up-to-date information on State practice. It is divided into four parts, covering respectively the African States, the Asian and South Pacific States, the European and North American Statesand the Latin American and Caribbean States. Each of those parts contains a brief overview of the most recent developments and links to available legislation that will be soon accompanied, to the extent possible, by illustrative maps. At a later stage, the legislation concerning baselines and maritime zones will be complemented with the bilateral (and, in some cases, trilateral) maritime boundary delimitation treatiesthat States have concluded.

4.     Regarding the national legislation, the purpose of this Internet publication is to set out the legislation that coastal States have adopted concerning their baselines and maritime zones on the basis, inter alia, of the 1982 Convention. The publication covers the legislation of both States Parties to the Convention and States which are not yet parties to it. The legislation of States Parties to the Convention is of particular interest inasmuch as such States in accordance with their treaty obligations must implement the Convention and apply its provisions by harmonizing their legislation or adopting legislation conforming to the Convention. However, the legislation of States which are not yet parties to the Convention is equally important since it allows to determine to which extent the rules contained in the Convention have been generally accepted by the international community as being rules of customary international law. Accordingly, assessing how non-party States incorporate the rules set forth in the Convention into their national legislation is essential for the coherent and systematic evaluation of the development of State practice.

5.    It is recalled that under the 1982 Convention coastal States possess or are permitted to establish various maritime zones, such as the territorial sea, the contiguous zone, the exclusive economic zone and the continental shelf, and may establish straight baselines or, in the case of archipelagic States, archipelagic baselines, from which the breadth of these maritime zones is measured. Thus, coastal States exercise sovereignty, sovereign rights and jurisdiction over substantial portions of the seas. The 1982 Convention fixed the limits of the territorial sea at up to 12 nautical miles, 24 nautical miles for the contiguous zone, and 200 nautical miles for the exclusive economic zone. The continental shelf extends to the outer edge of the continental margin, or to a distance of 200 nautical miles where the outer edge of the continental margin does not extend up to that distance. When the margin extends beyond 200 nautical miles, the outer limits of the continental shelf are determined by a complex formula contained in article 76 of the 1982 Convention. Under international law, the rights of a coastal State over the shelf do not depend on occupation, effective or notional, or on any express proclamation.

6.     It may be noted that the concept of the exclusive economic zone was introduced by the 1982 Convention. Under that concept, coastal States possess sovereign rights to explore and exploit all the resources of the sea-bed, the subsoil and of the water column out to a distance of 200 nautical miles from the baselines from which the territorial sea is measured.

7.     The provisions of the 1982 Convention relating to maritime zones and to the possibility for archipelagic States to draw under certain conditions straight baselines have all enhanced the importance of baselines since it is from them that the outer limits of the territorial sea, the contiguous zone, the exclusive economic zone and the continental shelf are measured.

8.    As regards the part of information which will be dealing with bilateral or multilateral maritime boundary delimitation treaties, in general the maritime zones subject to maritime boundary delimitation are the territorial sea, the contiguous zone, the exclusive economic zone and the continental shelf. By showing the maritime boundary delimitation treaties that have been concluded between coastal States with adjacent or opposite coasts regarding their maritime zones, we are in a position to provide a more complete picture of the extent of sovereignty or jurisdiction of each coastal State. As we progress in the development of that part of this site, we will also endeavour to provide illustrative maps Prepared by the Division.

9.    The official texts of the maritime boundary delimitation treatiesand subsequent actions in their authentic language(s), along with a translation into English and French, as appropriate, are contained in the United Nations Treaty Series, a United Nations publication. The on-line, subscription-based version of this publication is available at "". Only treaties which have entered into force and have been registered with the Secretariat of the United Nations under article 102 of the Charter of the United Nations are provided.

10.   Registration under Article 102 of the Charter of the United Nations of an instrument, such as a maritime boundary delimitation agreement, submitted by a Member State does not imply a judgement by the Secretariat on the nature of the instrument, the status of a party, or any similar question. It is the understanding of the Secretariat that its action does not confer on the instrument the status of a treaty or an international agreement if it does not already have that status and does not confer on a party a status which it would not otherwise have.

11.   The 1982 Convention provides for the deposit of charts and/or lists of geographical coordinates of points with the Secretary-General, and due publicity thereto, concerning baselines, the outer limits of maritime zones and/or lines of delimitation thereof. The act of deposit is an international act by a State Party to the Convention in order to comply with its deposit obligations after the entry into force of the Convention. While the object of the deposit under the Convention is the chart(s) and/or list(s), such charts and/or lists may be contained in national legislation or maritime boundary delimitation agreements. In such cases, deposits may be effected through the transmittal of such instruments to the Secretary-General. Further information concerning deposits under the Convention is available in the Guidelines on deposit with the Secretary-General of charts and lists of geographical coordinates of points under the United Nations Convention on the Law of the Seaand the Practice of the Secretary-General in respect of the deposit of charts and/or lists of geographical coordinates of points under the United Nations Convention on the Law of the Sea(document ).