ICRC databases on international humanitarian law
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Geneva Conventions of 1949 and Additional Protocols, and their Commentaries
Historical Treaties and Documents
Declaration concerning the Laws of Naval War. London, 26 February 1909.
Chapter I : Blockade in time of war - Art. 8.
Art. 8. A blockade, in order to be binding, must be declared in accordance with Article 9
, and notified in accordance with Articles 11