CountryActionAction DateEffective Date
AUSTRIAAccession11/09/1920
BELGIUMSignature20/03/1914
BELGIUMRatification04/11/1921
BRAZILAccession09/02/1922
BULGARIAAccession05/12/1921
CanadaAccession01/01/1924
CZECHOSLOVAKIAAccession22/02/1921
DANZIGAccession24/06/1922
DENMARKSignature20/03/1914
DENMARKRatification19/03/1915
ESTONIAAccession09/06/1927
FINLANDAccession01/04/1928
FRANCESignature20/03/1914
FRANCERatification02/02/1916
GERMANYSignature20/03/1914
GERMANYRatification17/10/1919
GREECEAccession10/03/1924
HAYTISignature20/03/1914
HUNGARYAccession14/02/1922
Irish Free StateAccession05/10/1927
ITALYSignature20/03/1914
ITALYRatification20/02/1930
JAPANSignature20/03/1914
JAPANRatification05/02/1915
LEBANONAccession28/03/1925
LIBERIASignature20/03/1914
LIBERIARatification09/09/1921
LUXEMBOURGSignature20/03/1914
LUXEMBOURGRatification11/03/1915
MONACOSignature20/03/1914
MONACORatification05/11/1914
NETHERLANDS THESignature20/03/1914
NETHERLANDS THERatification07/04/1918
NORWAYSignature20/03/1914
NORWAYRatification28/02/1920
PalestineAccession21/03/1924
POLANDAccession28/01/1920
PORTUGALSignature20/03/1914
ROUMANIAAccession01/01/1927
SIAMAccession17/07/1931
South AfricaAccession28/04/1920
South West AfricaAccession28/10/1931
SPAINSignature20/03/1914
SPAINRatification20/04/1915
SWEDENSignature20/03/1914
SWEDENRatification22/09/1919
SWITZERLANDSignature20/03/1914
SWITZERLANDRatification26/01/1915
SYRIAAccession28/03/1925
TUNISSignature20/03/1914
TUNISRatification23/04/1920
UNITED KINGDOMSignature20/03/1914
UNITED KINGDOMRatification08/07/1914
YUGOSLAVIAAccession17/06/1930