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Declaration concerning the Laws of Naval War. London, 26 February 1909.
Chapter II : Contraband of war - Art. 34.
Art. 34. The destination referred to in Article 33
is presumed to exist if the goods are consigned to enemy authorities, or to a contractor established in the enemy country who, as a matter of common knowledge, supplies articles of this kind to the enemy. A similar presumption arises if the goods are consigned to a fortified place belonging to the enemy, or other place serving as a base for the armed forces of the enemy. No such presumption, however, arises in the case of a merchant vessel bound for one of these places if it is sought to prove that she herself is contraband.
In cases where the above presumptions do not arise, the destination is presumed to be innocent.
The presumptions set up by this Article may be rebutted.