| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALGERIA | Signature | 28/06/1951 | |
| ALGERIA | Ratification | 19/10/1962 | |
| Anguilla | Extension | 08/05/1963 | |
| AUSTRALIA | Accession | 19/06/1969 | 19/06/1970 |
| AUSTRALIA | Declaration | 31/03/1971 | |
| AUSTRIA | Signature | 28/06/1951 | |
| AUSTRIA | Ratification | 29/10/1953 | |
| BELGIUM | Signature | 28/06/1951 | |
| BELGIUM | Ratification | 17/10/1968 | |
| BELIZE | Succession | 15/12/1983 | 15/12/1983 |
| Bermuda | Decision Resvd. | 29/12/1958 | |
| BRAZIL | Signature | 28/06/1951 | |
| BRAZIL | Ratification | 25/04/1957 | |
| British Honduras | Extension | 20/11/1963 | |
| British Virgin Islands | Decision Resvd. | 29/12/1958 | |
| CAMEROON | Accession | 25/05/1970 | |
| CENTRAL AFRICAN REPUBLIC | Signature | 28/06/1951 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 09/06/1964 | |
| CEYLON | Ratification | 06/04/1954 | |
| CEYLON | Signature | 28/06/1954 | |
| COLOMBIA | Signature | 28/06/1951 | |
| COLOMBIA | Ratification | 04/03/1969 | |
| COMOROS | Succession | 23/10/1978 | 23/10/1978 |
| Cook Islands | Extension | 01/07/1952 | |
| COSTA RICA | Signature | 28/06/1951 | |
| COSTA RICA | Ratification | 02/06/1960 | |
| CUBA | Signature | 28/06/1951 | |
| CUBA | Ratification | 13/01/1954 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Signature | 28/06/1951 | |
| CZECHOSLOVAKIA | Ratification | 21/01/1964 | |
| DJIBOUTI | Succession | 03/08/1978 | 03/08/1978 |
| Falkland Islands | Decision Resvd. | 29/12/1958 | |
| FRANCE | Signature | 28/06/1951 | |
| FRANCE | Ratification | 29/03/1954 | |
| FRANCE | Declaration | 27/11/1974 | |
| French Overseas Territories | Extension | 27/11/1974 | |
| GABON | Signature | 28/06/1951 | |
| GABON | Ratification | 13/06/1961 | |
| GAMBIA THE | Signature | 28/06/1951 | |
| GAMBIA THE | Ratification | 07/03/1963 | |
| GERMANY FEDERAL REPUBLIC | Signature | 28/06/1951 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 24/02/1954 | |
| Gibraltar | Not Applicable | 29/12/1958 | |
| Grenada | Extension | 01/02/1966 | |
| GRENADA | Succession | 09/07/1979 | |
| GUATEMALA | Signature | 28/06/1951 | |
| GUATEMALA | Ratification | 04/08/1961 | |
| Guernsey | App without mod | 03/09/1959 | |
| Guernsey | Declaration | 22/08/1994 | 22/08/1995 |
| GUINEA | Signature | 28/06/1951 | |
| GUINEA | Ratification | 12/12/1966 | |
| Hong Kong | Decision Resvd. | 29/12/1958 | |
| HUNGARY | Accession | 18/06/1969 | 18/06/1970 |
| IRELAND, REPUBLIC OF | Accession | 22/06/1978 | 22/06/1979 |
| Isle of Man | App without mod | 10/03/1956 | |
| ITALY | Accession | 05/05/1971 | |
| IVORY COAST | Signature | 28/06/1951 | |
| IVORY COAST | Ratification | 05/05/1961 | |
| Jersey | App without mod | 24/04/1966 | |
| KENYA | Accession | 09/02/1971 | |
| MALAWI | Signature | 28/06/1951 | |
| MALAWI | Ratification | 22/03/1965 | |
| MALTA | Accession | 28/11/1969 | |
| Mauritius | Extension | 29/12/1958 | |
| MAURITIUS | Succession | 02/12/1969 | |
| MEXICO | Signature | 28/06/1951 | |
| MEXICO | Ratification | 23/08/1952 | |
| Montserrat | Decision Resvd. | 29/12/1958 | |
| MOROCCO | Signature | 28/06/1951 | |
| MOROCCO | Ratification | 14/10/1960 | |
| NETHERLANDS THE | Signature | 28/06/1951 | |
| NETHERLANDS THE | Ratification | 11/06/1954 | |
| NETHERLANDS THE | Declaration | 26/11/1956 | |
| New Guinea | Extension | 31/03/1971 | |
| NEW ZEALAND | Signature | 28/06/1951 | |
| NEW ZEALAND | Ratification | 01/07/1952 | |
| NEW ZEALAND | Declaration | 01/07/1952 | |
| Niue Island | Extension | 01/07/1952 | |
| Nyasaland | Extension | 22/03/1958 | |
| Papua | Extension | 31/03/1971 | |
| Papua New Guinea | App. with mods. | 31/03/1971 | |
| Papua New Guinea | Extension | 21/06/1973 | |
| PAPUA NEW GUINEA | Succession | 01/05/1976 | |
| PARAGUAY | Signature | 28/06/1951 | |
| PARAGUAY | Ratification | 24/06/1964 | |
| PERU | Signature | 28/06/1951 | |
| PERU | Ratification | 01/02/1960 | |
| PHILIPPINES | Signature | 26/06/1951 | |
| PHILIPPINES | Ratification | 29/12/1953 | |
| POLAND | Accession | 05/07/1977 | 05/07/1978 |
| SENEGAL | Accession | 22/10/1962 | |
| Seychelles | Extension | 15/08/1967 | |
| SEYCHELLES | Succession | 06/02/1978 | 06/02/1978 |
| Sierra Leone | Extension | 29/12/1958 | |
| SIERRA LEONE | Succession | 13/06/1961 | |
| SINGAPORE | Signature | 28/06/1951 | |
| SINGAPORE | Ratification | 13/03/1961 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| Solomon Islands | Extension | 08/05/1963 | |
| SPAIN | Accession | 04/06/1970 | |
| St Helena | Decision Resvd. | 29/12/1958 | |
| St Kitts Nevis Anguilla | Extension | 08/05/1963 | |
| SWAZILAND | Ratification | 05/06/1981 | 05/06/1982 |
| SYRIA | Signature | 28/06/1951 | |
| SYRIA | Ratification | 10/08/1965 | |
| TUNISIA | Signature | 28/06/1951 | |
| TUNISIA | Ratification | 12/01/1959 | |
| TURKEY | Accession | 23/06/1970 | |
| UNITED KINGDOM | Signature | 28/06/1951 | |
| UNITED KINGDOM | Ratification | 09/06/1953 | |
| UNITED KINGDOM | Denunciation | 16/08/1994 | 16/08/1995 |
| UNITED KINGDOM | Declaration | 22/08/1994 | 22/08/1995 |
| URUGUAY | Signature | 28/06/1951 | |
| URUGUAY | Ratification | 18/03/1954 | |
| ZAMBIA | Accession | 20/06/1972 | |
| ZIMBABWE | Accession | 16/09/1993 | 16/09/1993 |