Transport on the part of Neutral Merchantmen and by neutral rolling stock.
§ 355. Just as a neutral is not obliged to prevent his merchantmen from carrying contraband, so he is not obliged to prevent them from rendering services to belligerents by carrying in the way of trade enemy troops, and the like, and enemy despatches. Neutral merchantmen rendering such services to belligerents do so at their own risk, for these are unneutral services for which the merchantmen may be punished[700] by the belligerents, but for which the neutral State under whose flag such merchantmen sail bears no responsibility whatever.
[700] See below, §§ [407]-413.
And the same is valid with regard to rolling stock belonging to private railway companies of a neutral State. That such rolling stock may not, without the consent of the companies owning it, be made use of by a belligerent for the transport of troops, war material, and the like, except in the case of and to the extent required by absolute necessity, follows from article 19 of Convention V. But, if a private railway company gives its consent, and if its rolling stock is made use of for warlike purposes, it acquires enemy character, article 19 of Convention V. does not apply, and the other belligerent may seize and appropriate it as though it were the property of the enemy State.[701]
[701] See Nowacki, Die Eisenbahnen im Kriege (1906), p. 128.
Information regarding Military and Naval Operations.
§ 356. Information regarding military and naval operations may be given and obtained in so many various ways that several cases must be distinguished:—
(1) It is obvious that the duty of impartiality incumbent upon a neutral obliges him to prevent his men-of-war from giving any information to a belligerent concerning naval operations of the other party. But a neutral bears no responsibility whatever for private vessels sailing under his flag which give such information. Such vessels run, however, the risk of being punished for rendering unneutral service.[702]
[702] See below, §§ [409] and [410], and articles 45, Nos. 1 and 2, and 46, No. 4, of the Declaration of London.
(2) It is likewise obvious that his duty of impartiality must prevent a neutral from giving information concerning the war to a belligerent through his diplomatic envoys, couriers, and the like. But the question has been raised as to whether a neutral is obliged to prevent couriers[703] from carrying despatches for a belligerent over his neutral territory. I believe the answer must be in the negative, at least so far as those couriers in the service of diplomatic envoys and such agents as carry despatches from a State to its head or to diplomatic envoys abroad are concerned. Since they enjoy—as stated above, [Vol. I. §§ 405] and [457]—inviolability for their persons and official papers, a neutral cannot interfere and find out whether these individuals carry information to the disadvantage of the enemy.