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| Territorial Sea Act 1987 | |
|---|---|
| Title | Territorial Sea Act 1987 |
| Jurisdiction | United Kingdom |
| Enacted | 1987 |
| Status | amended |
Territorial Sea Act 1987 The Territorial Sea Act 1987 is United Kingdom legislation that defines the extent of the United Kingdom's territorial sea and establishes legal baselines for maritime jurisdiction. Enacted by the Parliament of the United Kingdom during the Margaret Thatcher ministry, the Act updated precedents set by earlier statutes and influenced subsequent interactions with the United Nations Convention on the Law of the Sea and neighboring coastal states such as Ireland, France and Norway. The Act has been cited in litigation before the House of Lords (UK) and the European Court of Human Rights and has informed policies by the Foreign and Commonwealth Office and the Ministry of Defence.
The Act was drafted in the context of evolving international practice following the 1958 United Nations Conference on the Law of the Sea and the UNCLOS negotiations, and amid bilateral negotiations with Ireland, France and Iceland over maritime delimitation. Debates in the House of Commons of the United Kingdom and the House of Lords (UK) referenced precedent from the Territorial Waters Jurisdiction Act 1878 and statutory frameworks like the Fisheries Act 1981 and judicial decisions such as those in the Judicial Committee of the Privy Council. Parliamentary committees, including the Select Committee on European Legislation, examined implications for Merchant Shipping and coastal administration by authorities like the Maritime and Coastguard Agency.
The Act sets a territorial sea limit measured from specified baselines and confers sovereign rights and jurisdiction consistent with domestic law over surface navigation, criminal jurisdiction, and resource regulation, citing statutory powers analogous to those in the Fisheries Act 1981 and administrative authorities like the Department for Environment, Food and Rural Affairs. It prescribes how straight baselines may be drawn along coasts and around archipelagos, referencing methods used by Spain, Norway, and Australia, and establishes application of UK criminal statutes as interpreted by the Crown Prosecution Service and adjudicated in the Crown Court and appellate courts including the Supreme Court of the United Kingdom.
The Act provides rules for measuring baseline positions from which the territorial sea is calculated, echoing techniques seen in delimitation agreements such as the Anglo-French maritime delimitations and arbitration bodies like the International Court of Justice. Baseline determinations have been consequential in disputes with Ireland, negotiations with France over the English Channel and Bay of Biscay, and coordination with Isle of Man and Crown Dependencies authorities. Technical mapping involves the Ordnance Survey and hydrographic practices of the United Kingdom Hydrographic Office in relation to features recognized by the International Maritime Organization.
Subsequent modifications and related statutes include interactions with the Marine and Coastal Access Act 2009, adjustments under procedures influenced by UNCLOS, and operational changes stemming from the Maritime Security Act regime and instruments administered by the Foreign, Commonwealth & Development Office. European frameworks such as directives of the European Union influenced fisheries and environmental aspects until the Brexit process, which involved institutions like the Department for Exiting the European Union and prompted revisions coordinated with the Crown Prosecution Service and Maritime and Coastguard Agency.
Enforcement of the Act falls to agencies including the Ministry of Defence, the Maritime and Coastguard Agency, and prosecutorial authorities such as the Crown Prosecution Service, often working with naval assets like ships of the Royal Navy and aircraft from the Royal Air Force. Implementation has required charting by the United Kingdom Hydrographic Office and coordination with port authorities including Port of London Authority and Liverpool Port Authority for incident response and law-enforcement operations under statutes analogous to the Customs and Excise Act and maritime safety regimes overseen by the International Maritime Organization.
The Act has been the subject of litigation in domestic courts including the High Court of Justice (England and Wales), the Court of Appeal of England and Wales, and the House of Lords (UK), with cases addressing baseline calculations and jurisdictional reach paralleled by international precedents from the ITLOS and decisions of the International Court of Justice. Judicial review claims have invoked principles seen in cases before the European Court of Human Rights and UK administrative law tests developed in authorities such as Miller. Disputes over resource exploitation and enforcement have led to arbitration models followed in notable disputes like the North Sea Continental Shelf cases.
The Act interfaces with UNCLOS norms and bilateral treaties with neighbouring states including Ireland, France, Iceland, and Norway, and affects cooperation in regional fora such as the North Atlantic Salmon Conservation Organization and the International Maritime Organization. Its provisions inform UK positions in negotiations at the United Nations and in maritime delimitation processes mediated by the International Court of Justice and arbitral tribunals, and it has implications for rights and responsibilities recognized under instruments like the Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter.