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Manual of the Laws of Naval War. Oxford, 9 August 1913.
Section IV : On the rights and duties of the belligerent with regard to enemy property - Art. 49.
Art. 49. Suspension of immunities. The exceptions considered in Articles 41
cease to be applicable if the vessels to which they refer participate in the hostilities in any manner whatsoever or commit other acts which are forbidden to neutrals as unneutral service.
The same suspension occurs if, summoned to stop to submit to search, they seek to escape by force or by flight.