| Country | Action | Action Date | Effective Date |
|---|
| Anguilla | Extension | 29/05/1964 | |
| ARGENTINA | Ratification | 17/07/1968 | |
| AUSTRALIA | Ratification | 22/08/1974 | |
| Barbados | Extension | 29/05/1964 | |
| Basutoland | Extension | 29/05/1964 | |
| British Guiana | Extension | 29/05/1964 | |
| British Honduras | Extension | 29/05/1964 | |
| British Virgin Islands | Extension | 09/12/1964 | |
| Brunei | Extension | 29/05/1964 | |
| BRUNEI DARUSSALAM | Succession | 25/01/1985 | |
| BYELORUSSIA S S R | Objection | 01/01/1905 | |
| Cayman Islands | Extension | 29/05/1964 | |
| COSTA RICA | Ratification | 11/12/1969 | |
| CYPRUS | Acceptance | 09/06/1970 | |
| DENMARK | Ratification | 04/10/1963 | |
| DENMARK | Notification | 04/10/1963 | |
| Dominica | Extension | 29/05/1964 | |
| DOMINICA, COMMONWEALTH OF | Provisional application | 07/02/1983 | |
| EGYPT | Acceptance | 05/08/1974 | |
| Falkland Islands | Extension | 29/05/1964 | |
| FRANCE | Ratification | 24/04/1964 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 17/07/1968 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 17/07/1968 | |
| Gibraltar | Extension | 29/05/1964 | |
| Gilbert And Ellice Islands | Extension | 29/05/1964 | |
| Grenada | Extension | 29/05/1964 | |
| GUATEMALA | Ratification | 04/02/1983 | 04/05/1983 |
| ISRAEL | Ratification | 13/09/1967 | |
| ITALY | Ratification | 06/10/1966 | |
| IVORY COAST | Ratification | 24/11/1999 | 24/02/2000 |
| Land Berlin | Extension | 17/07/1968 | |
| LIBYA | Ratification | 09/01/1973 | |
| MADAGASCAR | Acceptance | 21/12/1964 | |
| Malta | Extension | 29/05/1964 | |
| MALTA | Succession | 05/01/1966 | |
| Mauritius | Extension | 29/05/1964 | |
| Montserrat | Extension | 29/05/1964 | |
| MOROCCO | Acceptance | 30/08/1968 | |
| NETHERLANDS THE | Ratification | 25/03/1966 | |
| NIGER | Acceptance | 16/07/1968 | |
| NORWAY | Acceptance | 10/09/1968 | |
| PANAMA | Acceptance | 10/08/1967 | |
| PHILIPPINES | Acceptance | 19/11/1964 | |
| PORTUGAL | Ratification | 11/01/1982 | 11/04/1982 |
| SENEGAL | Ratification | 24/07/1968 | |
| Seychelles | Extension | 29/05/1964 | |
| SOLOMON ISLANDS | Succession | 19/03/1982 | 07/07/1973 |
| Solomon Islands Protectorate | Extension | 29/05/1964 | |
| SOUTH AFRICA | Ratification | 09/03/2000 | 09/06/2000 |
| SOVIET UNION | Objection | 01/01/1905 | |
| SPAIN | Acceptance | 26/06/1992 | 26/09/1992 |
| St Helena | Extension | 29/05/1964 | |
| St Kitts Nevis Anguilla | Extension | 29/05/1964 | |
| St Lucia | Extension | 29/05/1964 | |
| St Vincent | Extension | 29/05/1964 | |
| ST VINCENT AND THE GRENADINES | Provisional application | 22/01/1985 | |
| Swaziland | Extension | 29/05/1964 | |
| The Gambia | Extension | 29/05/1964 | |
| Tonga | Extension | 29/05/1964 | |
| Turks And Caicos Islands | Extension | 29/05/1964 | |
| UGANDA | Acceptance | 09/09/1968 | |
| UKRAINE | Objection | 01/01/1905 | |
| UNITED KINGDOM | Acceptance | 08/01/1964 | |
| UNITED KINGDOM | Declaration | 29/05/1964 | |
| UNITED KINGDOM | Declaration | 09/12/1964 | |
| VIETNAM, REPUBLIC OF | Acceptance | 12/06/1968 | |