§ 146. As the Open Sea is not under the sway of any State, no State can exercise its jurisdiction there. But it is a rule of the Law of Nations that the vessels and the things and persons thereon remain during the time they are on the Open Sea under the jurisdiction of the State under whose flag they sail.[237] It is another rule of the Law of Nations that piracy[238] on the Open Sea can be punished by any State, whether or no the pirate sails under the flag of a State. Further,[239] a general practice seems to admit the claim of every maritime State to exercise jurisdiction over cases of collision at sea, whether the vessels concerned are or are not sailing under its flag. Again, in the interest of the safety of the Open Sea, every State has the right to order its men-of-war to ask any suspicious merchantman they meet on the Open Sea to show the flag, to arrest foreign merchantmen sailing under its flag without an authorisation for its use, and to pursue into the Open Sea and to arrest there such foreign merchantmen as have committed a violation of its law whilst in its ports or maritime belt.[240] Lastly, in time of war belligerent States have the right to order their men-of-war to visit, search, and eventually capture on the Open Sea all neutral vessels for carrying contraband, breach of blockade, or unneutral services to the enemy.
[240] See below, §§ [265]-266.
Criminal Jurisdiction over Foreigners in Foreign States.
§ 147. Many States claim jurisdiction and threaten punishment for certain acts committed by a foreigner in foreign countries.[241] States which claim jurisdiction of this kind threaten punishment for certain acts either against the State itself, such as high treason, forging bank-notes, and the like, or against its citizens, such as murder or arson, libel and slander, and the like. These States cannot, of course, exercise this jurisdiction as long as the foreigner concerned remains outside their territory. But if, after the committal of such act, he enters their territory and comes thereby under their territorial supremacy, they have an opportunity of inflicting punishment. The question is, therefore, whether States have a right to jurisdiction over acts of foreigners committed in foreign countries, and whether the home State of such an alien has a duty to acquiesce in the latter's punishment in case he comes into the power of these States. The question must be answered in the negative. For at the time such criminal acts are committed the perpetrators are neither under the territorial nor under the personal supremacy of the States concerned. And a State can only require respect for its laws from such aliens as are permanently or transiently within its territory. No right for a State to extend its jurisdiction over acts of foreigners committed in foreign countries can be said to have grown up according to the Law of Nations, and the right of protection over citizens abroad held by every State would justify it in an intervention in case one of its citizens abroad should be required to stand his trial before the Courts of another State for criminal acts which he did not commit during the time he was under the territorial supremacy of such State.[242] In the only[243] case which is reported—namely, in the case of Cutting—an intervention took place according to this view. In 1886, one A. K. Cutting, a subject of the United States, was arrested in Mexico for an alleged libel against one Emigdio Medina, a subject of Mexico, which was published in the newspaper of El Paso in Texas. Mexico maintained that she had a right to punish Cutting, because according to her Criminal Law offences committed by foreigners abroad against Mexican subjects are punishable in Mexico. The United States, however, intervened,[244] and demanded Cutting's release. Mexico refused to comply with this demand, but nevertheless Cutting was finally released, as the plaintiff withdrew his action for libel. Since Mexico likewise refused to comply with the demand of the United States to alter her Criminal Law for the purpose of avoiding in the future a similar incident, diplomatic practice has not at all settled the subject.
[241] See Hall, § 62; Westlake, I. pp. 251-253; Lawrence, § 104; Taylor, § 191; Moore, II. §§ 200 and 201; Phillimore, I. § 334.
[242] The Institute of International Law has studied the question at several meetings and in 1883, at its meeting at Munich (see Annuaire, VII. p. 156), among a body of fifteen articles concerning the conflict of the Criminal Laws of different States, adopted the following (article 8):—"Every State has a right to punish acts committed by foreigners outside its territory and violating its penal laws when those acts contain an attack upon its social existence or endanger its security and when they are not provided against by the Criminal Law of the territory where they take place." But it must be emphasised that this resolution has value de lege ferenda only.
[243] The case of Cirilo Pouble—see Moore, II. § 200, pp. 227-228—concerning which the United States at first were inclined to intervene, proved to be a case of a crime committed within Spanish jurisdiction. The case of John Anderson—see Moore, I. § 174, p. 933—is likewise not relevant, as he claimed to be a British subject.