| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 29/07/1954 | |
| BELGIUM | Ratification | 16/07/1956 | 16/07/1956 |
| BELGIUM | Withdrawal | 30/06/1964 | 30/06/1965 |
| CAMEROON | Accession | 28/12/1961 | |
| CENTRAL AFRICAN REPUBLIC | Accession | 05/01/1962 | |
| CHAD | Accession | 11/04/1962 | |
| CHAD | Reservation | 11/04/1962 | |
| CONGO | Accession | 05/02/1962 | |
| FRANCE | Signature | 29/07/1954 | |
| FRANCE | Ratification | 15/06/1956 | |
| FRANCE | Withdrawal | 11/06/1964 | 11/06/1965 |
| GABON | Accession | 25/01/1962 | |
| GHANA | Accession | 28/03/1958 | |
| GUINEA | Accession | 24/02/1962 | |
| IVORY COAST | Accession | 22/01/1962 | |
| LIBERIA | Accession | 05/02/1962 | |
| MALAGASY REPUBLIC | Accession | 02/02/1962 | |
| MALAWI | Accession | 01/04/1965 | |
| MALI | Accession | 14/01/1963 | |
| MAURITANIA | Accession | 24/02/1962 | |
| NIGER | Accession | 17/10/1961 | |
| NIGERIA | Accession | 08/11/1961 | |
| PORTUGAL | Signature | 29/07/1954 | |
| PORTUGAL | Ratification | 16/07/1957 | |
| Rhodesia And Nyasaland | Signature | 29/07/1954 | |
| Rhodesia And Nyasaland | Ratification | 27/07/1955 | |
| SENEGAL | Accession | 17/10/1961 | |
| SIERRA LEONE | Accession | 30/05/1962 | |
| SOUTH AFRICA | Signature | 29/07/1954 | |
| SOUTH AFRICA | Ratification | 03/11/1955 | |
| SOUTH AFRICA | Withdrawal | 24/02/1965 | 24/02/1966 |
| TANGANYIKA | Accession | 31/05/1962 | |
| UGANDA | Accession | 20/04/1965 | |
| UNITED KINGDOM | Signature | 29/07/1954 | |
| UNITED KINGDOM | Ratification | 14/12/1954 | |
| UNITED KINGDOM | Withdrawal | 11/06/1964 | 11/06/1965 |
| ZAIRE | Accession | 21/09/1962 | |