PUBLIC INTERNATIONAL LAW UNIT VI
- www.lawtool.net
- Aug 16, 2020
- 5 min read
Updated: Apr 24
The seas and oceans cover over 70% of the Earth's surface. They are crucial for global commerce, navigation, and biodiversity. As humanity has progressed, so too has our understanding of how to manage these vast waters. The legal regime of the seas comprises international laws and agreements. These regulations govern marine resource use, navigation rights, and environmental protection. This post explores the evolution of the law of the sea, the United Nations Convention on the Law of the Sea (UNCLOS), key maritime zones like the Exclusive Economic Zone (EEZ) and the continental shelf, challenges faced by landlocked countries, and the role of the International Tribunal for the Law of the Sea.
PUBLIC INTERNATIONAL LAW UNIT VI
The Legal Regime of the Seas
Evolution of the Law of the Sea
United Nations Convention on the Law of the Seas
Maritime Belt, Contiguous Zone, Continental Shelf, Exclusive Economic Zone
The High Seas
Land Locked States
International Tribunal for the Law of the Sea
Evolution of the Law of the Sea
The journey toward establishing the legal framework for the seas has been extensive and complex. Maritime law dates back to ancient civilizations, where states claimed ownership over nearby waters. As exploration expanded, the need for formal laws became clear to manage disputes and resource sharing.
In the 17th century, the concept of territorial waters came into play, allowing coastal states control over waters typically up to three nautical miles from their shores. Important figures like Hugo Grotius advanced ideas about the freedom of the seas in his work Mare Liberum, which encouraged countries to adopt cooperative international maritime practices.
This ongoing quest for comprehensive maritime legislation peaked in the mid-20th century with the formation of the United Nations. As tensions rose over resource ownership, the UN hosted the first United Nations Conference on the Law of the Sea (UNCLOS I) in 1956, leading to subsequent conferences and the eventual establishment of UNCLOS.
Evolution of the Law of the Sea
Historical Background: Initially governed by the principle of freedom of the seas (Hugo Grotius, 1609), where the seas were considered free for navigation by all.
Challenges: With technological advances and resource competition, nations started claiming parts of the ocean.
Development: Customary practices evolved, leading to formal negotiations under the UN.
United Nations Convention on the Law of the Sea
Adopted in 1982, the United Nations Convention on the Law of the Sea (UNCLOS) serves as the foundation of contemporary maritime law. It addresses numerous issues, from maritime boundaries to the rights of coastal nations and the protection of marine biodiversity.
UNCLOS outlines various maritime zones, detailing the rights and responsibilities of nations. With 168 parties, including the European Union, it is one of the most widely accepted international agreements. However, some states, like the United States, have yet to ratify it, raising questions about compliance and enforcement.
United Nations Convention on the Law of the Sea (UNCLOS)
Adopted: 1982, came into force in 1994.
Purpose: Codifies rights and responsibilities of nations in their use of the world’s oceans, promoting peaceful use, equitable resource sharing, and environmental protection.
Divisions: Defines maritime zones and jurisdictional boundaries.
Parties: Over 160 states are parties to UNCLOS.
Maritime Belt, Contiguous Zone, Continental Shelf, Exclusive Economic Zone
Maritime Belt
The maritime belt, or territorial waters, extends 12 nautical miles from a coastal state's baseline. Within this area, states can manage navigation, resource extraction, and environmental protection. For example, the United Kingdom recently strengthened its fisheries laws within this zone to protect marine life, showing the importance of such regulations.
Contiguous Zone
The contiguous zone stretches an additional 12 nautical miles, reaching up to 24 nautical miles from the baseline. Here, states can enforce laws regarding customs, immigration, and sanitation. This area enhances coastal states' maritime security while allowing for innocent passage of vessels.
Continental Shelf
Extending up to 200 nautical miles from the baseline, the continental shelf includes the seabed and subsoil. Coastal nations have exclusive rights to explore and exploit resources like oil and natural gas below the seabed. The economic potential of the continental shelf is substantial. For instance, the United States gained access to an estimated 6 billion barrels of oil equivalent in its continental shelf following a recent assessment.
Exclusive Economic Zone (EEZ)
The Exclusive Economic Zone (EEZ) reaches 200 nautical miles from the baseline, giving coastal states exclusive rights to manage resources in this zone. This includes fisheries and seabed mining, which are critical for food security and economic growth. Proper management is crucial, as studies show that unsustainable fishing could deplete fish stocks by up to 50% by 2050.
Maritime Zones under UNCLOS
a. Territorial Sea (Maritime Belt)
Extent: Up to 12 nautical miles from baseline.
Sovereignty: Full sovereignty, similar to land territory.
Right of Innocent Passage: Foreign ships can pass through under certain conditions.
b. Contiguous Zone
Extent: 12 to 24 nautical miles.
Control: Limited to customs, immigration, and sanitary laws enforcement.
c. Continental Shelf
Extent: Natural prolongation of land up to 200 nautical miles (can extend to 350).
Rights: Sovereign rights for exploration and exploitation of natural resources.
d. Exclusive Economic Zone (EEZ)
Extent: Up to 200 nautical miles.
Rights: Exclusive rights for economic activities like fishing, oil exploration, etc.
The High Seas
Beyond national jurisdiction lies the high seas, projecting over 64% of the world's oceans, which are not covered by national EEZs or territorial seas. High seas activities include navigation and fishing. Despite freedoms enjoyed in these waters, UNCLOS mandates that activities must occur with consideration for other states' interests.
Challenges like overfishing, marine pollution, and piracy are pressing issues. In fact, it's estimated that illegal fishing costs the global economy around $10 billion annually. More international cooperation is essential to safeguard these shared resources.
Landlocked States
Landlocked countries face unique hurdles in accessing maritime resources and sea-trading opportunities. UNCLOS recognizes their challenges, providing rights to access the sea without transit taxes. For instance, a landlocked nation like Afghanistan relies heavily on neighboring countries for access to ports, which can create trade barriers.
The enforcement of these rights often depends on the goodwill of adjacent coastal nations, leading to potential political conflicts.
International Tribunal for the Law of the Sea
Established in 1996, the International Tribunal for the Law of the Sea (ITLOS) is vital for resolving legal disputes linked to maritime law. Located in Hamburg, Germany, ITLOS handles conflicts concerning UNCLOS provisions.
With numerous cases, ITLOS has contributed to peaceful resolutions, supporting principles of collaboration and environmental protection. Its rulings have emphasized the importance of protecting marine environments and ensuring fair maritime practices.
International Tribunal for the Law of the Sea (ITLOS)
Established: 1996, under UNCLOS.
Headquarters: Hamburg, Germany.
Function: Resolves disputes arising from the interpretation and application of UNCLOS.
Jurisdiction: Open to states, organizations, and in some cases, private parties.
Navigating the Legal Seas
Understanding the legal regime of the seas is crucial for managing our shared resources. From its historical roots to the comprehensive framework of UNCLOS, maritime law significantly impacts international relations. Current challenges like climate change, overfishing, and geopolitical tensions highlight the need for ongoing dialogue and cooperation among nations.
A strong legal structure promotes peace and the sustainable use of marine resources, ensuring future generations can benefit from the oceans' bounty. The United Nations Convention on the Law of the Sea remains a testament to our collective commitment to responsibly steward our ocean resources for generations to come.

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