This Suez Canal of such great international importance is by this convention within the jurisdiction of Egypt, but the powers have assumed to provide that this jurisdiction shall not be exercised in such a way as to prevent innocent passage.
The Panama or Nicaraguan Canal is in part provided for by the Clayton-Bulwer Treaty, between the United States and Great Britain in 1850, but in case of actual operation new agreements would be necessary.[141]
The canal at Corinth, shortening somewhat the route to the Black Sea and Asia Minor, was opened in 1893. This canal does not, like the Suez, greatly change the current of the world's intercourse, and is entirely within the jurisdiction of Greece.
Similarly the canal at Kiel, opened in 1896, is wholly within the jurisdiction of Germany.
[§ 53. The Three-mile Limit]
One of the most generally recognized rules of international law is that the jurisdiction of a state extends upon the open sea to a distance of three miles from the low-water mark. In the words of the Act of Parliament passed in consequence of the case of the Franconia,[142] 1878 (41 and 42 Victoria, c. 73), "The territorial waters of Her Majesty's dominions, in reference to the sea, means such part of the sea adjacent to the coast of the United Kingdom, or the coast of some other part of Her Majesty's dominions, as is deemed by international law to be within the territorial sovereignty of Her Majesty; and for the purpose of any offence declared by this Act to be within the jurisdiction of the Admiral, any part of the open sea within one marine league of the coast measured from low-water mark shall be deemed to be open sea within the territorial waters of Her Majesty's dominions." The three-mile limit became more and more generally recognized after the publication of Bynkershoek's "De Dominio Maris," in which he enunciates the principle that the territorial jurisdiction ends where the effective force of arms ends, which being approximately three miles from shore at that time, has since been usually accepted.
For special purposes a wider limit of jurisdiction is maintained and sometimes accepted by courtesy, though it is doubtful whether any state would attempt to hold its position against a protest from another state. The claims are based on the jurisdiction over fisheries, the enforcement of revenue laws, and the maintenance of neutrality. Such claims as the former English claims to the "King's Chambers," announced in 1604 to be bounded by a "straight line drawn from one point to another about the realm of England," as from the Lizard to Land's End, would not now receive serious support; and since the rejection of the claims of the United States by the Bering Sea Tribunal, it can be safely stated that the expansion of territorial jurisdiction upon the open sea will only come through the consensus of states. The desirability of some new regulations upon marine jurisdiction was well shown in the discussions of the Institute of International Law at its meeting in Paris in 1894.[143]
Within the three-mile limit the jurisdiction extends to commercial regulations, rules for pilotage and anchorage, sanitary and quarantine regulations, control of fisheries, revenue, general police, and in time of war to the enforcement of neutrality.
[§ 54. Fisheries]
The existence of fisheries has given rise to some special claims to extension of maritime jurisdiction.