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First draft Convention adopted in Monaco (Sanitary cities and localities), 27 July 1934.
I. - Sanitary cities and localities - Art. 3.
Art.3. The town must be notified either in time of peace or at the opening of or during the hostilities.
Such notification shall be made:
a) In time of peace, through the diplomatic channel, to all Governments;
b) At the opening of or during the hostilities, between belligerents, through the medium of the Protecting Power.
'Variant or better':
... as well in time of peace as in time of war through the medium of an international organ (to be defined).