| Country | Action | Action Date | Effective Date |
|---|
| AFGHANISTAN | Acceptance | 01/12/1949 | |
| ALBANIA | Acceptance | 12/11/1973 | |
| ALGERIA | Acceptance | 19/11/1963 | |
| ANGOLA | Acceptance | 14/11/1977 | |
| ANTIGUA AND BARBUDA | Acceptance | 08/11/1983 | |
| ARGENTINA | Acceptance | 27/11/1951 | |
| ARMENIA | Membership | | 08/11/1993 |
| AUSTRALIA | Signature | 16/10/1945 | |
| AUSTRIA | Acceptance | 27/08/1947 | |
| AZERBAIJAN | Membership | | 20/10/1995 |
| BAHAMAS | Acceptance | 10/11/1975 | |
| BAHRAIN | Acceptance | 06/11/1967 | |
| BANGLADESH | Acceptance | 12/11/1973 | |
| BARBADOS | Acceptance | 06/11/1967 | |
| Basutoland | Extension | 22/11/1965 | |
| Bechuanaland | Extension | 22/11/1965 | |
| BELGIUM | Signature | 16/10/1945 | |
| BELIZE | Acceptance | 08/11/1983 | |
| BHUTAN | Acceptance | 07/11/1981 | |
| BOLIVIA | Signature | 26/11/1945 | 16/10/1945 |
| BOSNIA AND HERZEGOVINA | Membership | | 08/11/1993 |
| BOTSWANA | Acceptance | 01/11/1966 | |
| BRAZIL | Signature | 16/10/1945 | |
| BULGARIA | Acceptance | 06/11/1967 | |
| BURMA | Acceptance | 11/09/1947 | |
| BURUNDI | Acceptance | 19/11/1963 | |
| CAMBODIA | Acceptance | 11/11/1950 | |
| CAMEROON | Acceptance | 22/03/1960 | |
| CANADA | Signature | 16/10/1945 | |
| CAPE VERDE | Acceptance | 10/11/1975 | |
| CENTRAL AFRICAN REPUBLIC | Acceptance | 09/11/1961 | |
| CEYLON | Acceptance | 21/05/1948 | |
| CHAD | Acceptance | 09/11/1961 | |
| CHILE | Signature | 17/05/1946 | |
| CHINA | Signature | 16/10/1945 | |
| CHINA | Withdrawal | 21/07/1952 | |
| CHINA | Re-Application | 01/04/1973 | |
| COLOMBIA | Signature | 17/10/1945 | |
| COMOROS | Acceptance | 14/11/1977 | |
| CONGO, PEOPLES REPUBLIC OF | Acceptance | 09/11/1961 | |
| COOK ISLANDS | Acceptance | 17/12/1984 | |
| COSTA RICA | Signature | 07/04/1948 | |
| CROATIA | Membership | | 08/11/1993 |
| CUBA | Signature | 19/10/1945 | |
| CYPRUS | Acceptance | 14/09/1960 | |
| CZECH REPUBLIC | Membership | | 08/11/1993 |
| CZECHOSLOVAKIA | Signature | 16/10/1945 | |
| CZECHOSLOVAKIA | Withdrawal | 27/12/1950 | |
| CZECHOSLOVAKIA | Re-Application | 10/11/1969 | |
| DAHOMEY | Acceptance | 09/11/1961 | |
| DENMARK | Signature | 16/10/1945 | |
| DJIBOUTI | Acceptance | 14/11/1977 | |
| DOMINICA, COMMONWEALTH OF | Acceptance | 12/11/1979 | |
| DOMINICAN REPUBLIC | Signature | 16/10/1945 | |
| ECUADOR | Signature | 07/12/1945 | 16/10/1945 |
| EGYPT | Signature | 16/10/1945 | |
| EL SALVADOR | Signature | 19/08/1947 | |
| EQUATORIAL GUINEA | Acceptance | 07/11/1981 | |
| ERITREA | Membership | | 08/11/1993 |
| ESTONIA | Membership | | 11/11/1991 |
| ETHIOPIA | Signature | 06/01/1948 | 01/01/1948 |
| FIJI | Acceptance | 08/11/1971 | |
| FINLAND | Acceptance | 27/08/1947 | |
| FRANCE | Signature | 16/10/1945 | |
| GABON | Acceptance | 09/11/1961 | |
| GAMBIA THE | Acceptance | 22/11/1963 | |
| GEORGIA | Membership | | 20/10/1995 |
| GERMANY FEDERAL REPUBLIC | Acceptance | 27/11/1950 | |
| GHANA | Acceptance | 09/11/1957 | |
| GREECE | Signature | 16/10/1945 | |
| GRENADA | Acceptance | 10/11/1975 | |
| GUATEMALA | Signature | 16/10/1945 | |
| GUINEA | Acceptance | 05/11/1959 | |
| GUINEA BISSAU | Acceptance | 26/11/1973 | |
| GUYANA | Acceptance | 22/08/1966 | |
| HAITI | Signature | 16/10/1945 | |
| HONDURAS | Signature | 16/10/1945 | |
| HUNGARY | Signature | 30/12/1946 | |
| HUNGARY | Withdrawal | 26/01/1952 | |
| HUNGARY | Re-Application | 06/11/1967 | |
| ICELAND | Signature | 16/10/1945 | |
| INDIA | Signature | 16/10/1945 | |
| INDONESIA | Acceptance | 28/11/1949 | |
| INDONESIA | Withdrawal | 12/02/1966 | |
| IRAN | Signature | 01/12/1953 | |
| IRAQ | Signature | 16/10/1945 | |
| IRELAND, REPUBLIC OF | Acceptance | 03/09/1946 | |
| ISRAEL | Acceptance | 23/11/1949 | |
| ITALY | Acceptance | 12/09/1946 | |
| IVORY COAST | Acceptance | 09/11/1961 | |
| JAMAICA | Acceptance | 13/03/1963 | |
| JAPAN | Acceptance | 21/11/1951 | |
| JORDAN | Acceptance | 23/01/1951 | |
| KENYA | Acceptance | 27/01/1964 | |
| KOREA DEMOCRATIC PEOPLE'S REPUBLIC OF | Acceptance | 14/11/1977 | |
| KOREA REPUBLIC OF | Acceptance | 25/11/1949 | |
| KUWAIT | Acceptance | 09/11/1961 | |
| KYRGYZSTAN | Membership | | 08/11/1993 |
| LAOS | Acceptance | 21/11/1951 | |
| LATVIA | Membership | | 11/11/1991 |
| LEBANON | Acceptance | 27/10/1945 | |
| LESOTHO | Acceptance | 07/11/1966 | |
| LIBERIA | Signature | 16/10/1945 | |
| LIBYA | Acceptance | 24/11/1953 | |
| LITHUANIA | Membership | | 11/11/1991 |
| LUXEMBOURG | Signature | 16/10/1945 | |
| MACEDONIA THE FYR OF | Membership | | 08/11/1993 |
| MADAGASCAR | Acceptance | 09/11/1961 | |
| MALAWI | Acceptance | 22/11/1965 | |
| MALAYA | Acceptance | 09/11/1957 | |
| MALDIVES | Acceptance | 08/11/1971 | |
| MALI | Acceptance | 09/11/1961 | |
| MALTA | Acceptance | 05/10/1964 | |
| MAURITANIA | Acceptance | 09/11/1961 | |
| Mauritius | Extension | 09/11/1961 | |
| MAURITIUS | Acceptance | 12/03/1968 | |
| MAURITIUS | Objection | 12/03/1968 | |
| MEXICO | Signature | 16/10/1945 | |
| MOLDOVA REPUBLIC OF | Membership | | 20/10/1995 |
| MONGOLIA | Acceptance | 12/11/1973 | |
| MOROCCO | Acceptance | 13/09/1956 | |
| MOZAMBIQUE | Accession | 14/11/1977 | |
| NAMIBIA | Acceptance | 14/11/1977 | |
| NEPAL | Acceptance | 27/11/1951 | |
| NETHERLANDS THE | Signature | 16/10/1945 | |
| NEW ZEALAND | Signature | 16/10/1945 | |
| NICARAGUA | Signature | 16/10/1945 | |
| NIGER | Acceptance | 09/11/1961 | |
| NIGERIA | Acceptance | 11/10/1960 | |
| NORWAY | Signature | 16/10/1945 | |
| OMAN | Acceptance | 08/11/1971 | |
| PAKISTAN | Acceptance | 07/09/1947 | |
| PANAMA | Signature | 16/10/1945 | |
| PAPUA NEW GUINEA | Acceptance | 10/11/1975 | |
| PARAGUAY | Signature | 30/10/1945 | |
| PERU | Signature | 17/06/1952 | |
| PHILIPPINES | Signature | 16/10/1945 | |
| POLAND | Signature | 16/10/1945 | |
| POLAND | Withdrawal | 25/04/1951 | |
| POLAND | Re-Application | 09/11/1957 | |
| PORTUGAL | Acceptance | 11/09/1946 | |
| QATAR | Acceptance | 06/11/1967 | |
| ROMANIA | Acceptance | 09/11/1961 | |
| RWANDA | Acceptance | 19/11/1963 | |
| SAINT CHRISTOPHER AND NEVIS | Acceptance | 08/11/1983 | |
| SAINT LUCIA | Acceptance | 12/11/1979 | |
| SAMOA | Acceptance | 12/11/1979 | |
| SAO TOME AND PRINCIPE | Acceptance | 14/11/1977 | |
| SAUDI ARABIA | Acceptance | 23/11/1948 | |
| SENEGAL | Acceptance | 09/11/1961 | |
| SEYCHELLES | Membership | | 14/11/1977 |
| SIERRA LEONE | Acceptance | 09/11/1961 | |
| SLOVAK REPUBLIC | Membership | | 08/11/1993 |
| SLOVENIA | Membership | | 08/11/1993 |
| SOLOMON ISLANDS | Membership | | 11/11/1985 |
| SOMALIA | Acceptance | 17/11/1960 | |
| SOUTH AFRICA | Signature | 16/10/1945 | |
| SOUTH AFRICA | Withdrawal | 18/12/1964 | |
| SPAIN | Acceptance | 05/04/1951 | |
| ST VINCENT AND THE GRENADINES | Acceptance | 07/11/1981 | |
| SUDAN | Acceptance | 13/09/1956 | |
| SURINAME | Acceptance | 10/11/1975 | |
| SWAZILAND | Acceptance | 08/11/1971 | |
| SWEDEN | Acceptance | 13/02/1950 | |
| SWITZERLAND | Acceptance | 11/09/1946 | |
| SYRIA | Acceptance | 27/10/1945 | |
| TAJIKISTAN | Membership | | 20/10/1995 |
| TANGANYIKA | Acceptance | 08/02/1962 | |
| THAILAND | Acceptance | 27/08/1947 | |
| TOGO | Acceptance | 23/05/1960 | |
| TONGA | Acceptance | 07/11/1981 | |
| TRINIDAD AND TOBAGO | Acceptance | 19/11/1963 | |
| TUNISIA | Acceptance | 25/11/1955 | |
| TURKEY | Acceptance | 06/04/1948 | |
| TURKMENISTAN | Membership | | 20/10/1995 |
| UGANDA | Acceptance | 19/11/1963 | |
| UNITED ARAB EMIRATES | Acceptance | 12/11/1973 | |
| UNITED KINGDOM | Signature | 16/10/1945 | |
| UNITED KINGDOM | Declaration | 16/10/1945 | |
| UNITED STATES OF AMERICA | Signature | 16/10/1945 | |
| UPPER VOLTA | Acceptance | 09/11/1961 | |
| URUGUAY | Signature | 30/11/1945 | |
| VANUATU | Acceptance | 08/11/1993 | |
| VENEZUELA | Signature | 16/10/1945 | |
| VIETNAM | Acceptance | 11/11/1950 | |
| YEMEN ARAB REPUBLIC | Acceptance | 09/12/1953 | |
| YEMEN, PEOPLES'S DEMOCRATIC REPUBLIC OF | Acceptance | 10/11/1969 | |
| YUGOSLAVIA | Signature | 08/12/1952 | 16/10/1945 |
| ZAIRE | Acceptance | 09/11/1961 | |
| ZAMBIA | Acceptance | 01/01/1753 | |
| ZIMBABWE | Acceptance | 07/11/1981 | |