CountryActionAction DateEffective Date
BELGIUMSignature03/03/1911
BELGIUMRatification10/04/1911
UNITED KINGDOMSignature03/03/1911
UNITED KINGDOMRatification10/03/1911
UNITED KINGDOMExtension23/08/1934
UNITED KINGDOMExtension13/05/1937