Treaties, States Parties and Commentaries
Treaties and Documents
Geneva Conventions of 1949 and Additional Protocols, and their Commentaries
Historical Treaties and Documents
Convention on Maritime Neutrality. Havana, 20 February 1928.
Section III : Rights and duties of neutrals - Art. 21.
Art. 21. Should it be found that a merchantman flying a belligerent flag, by its preparations or other circumstances, can supply to warships of a state the stores which they need, the local authority may refuse it supplies or demand of the agent of the company a guaranty that the said ship will not aid or assist any belligerent vessel.