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First draft Convention adopted in Monaco (Sanitary cities and localities), 27 July 1934.
V. - Sanctions - Art. 5.
Art.5 When it has been ascertained a first time that the rights of humanity have been violated, especially against sanitary towns and security towns, and a second and, much more, a third violation is committed, the belligerent, victim of such repeated violations, is disengaged from his obligations in the same measure in which the adversary has disengaged himself from his own obligations.
In such case, the non-belligerents may withdraw their medical assistance from the author of such violations.