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Convention on Maritime Neutrality. Havana, 20 February 1928.
Section II : Duties and rights of belligerents - Art. 6.
Art. 6. The ship which does not conform to the foregoing rules may be interned by order of the neutral government.
A ship shall be considered as interned from the moment it receives notice to that effect from the local neutral authority, even though a petition for reconsideration of the order has been interposed by the transgressing vessel, which shall remain under custody from the moment it receives the order.