Ratifications
As of September 2023, the convention had been ratified by 54 states. One ratifying state—the United Kingdom—has denounced the treaty.
| Country | Date |
|---|---|
 Algeria
|
19 Oct 1962 |
 Australia
|
19 Jun 1969 |
 Austria
|
29 Oct 1953 |
 Belgium
|
17 Oct 1968 |
 Belize
|
15 Dec 1983 |
 Cameroon
|
25 May 1970 |
 Central African Republic
|
09 Jun 1964 |
 Colombia
|
04 Mar 1969 |
 Comoros
|
23 Oct 1978 |
 Cook Islands
|
12 Jun 2015 |
 Costa Rica
|
02 Jun 1960 |
 Cuba
|
13 Jan 1954 |
 Czechia
|
01 Jan 1993 |
 Côte d'Ivoire
|
05 May 1961 |
 Djibouti
|
03 Aug 1978 |
 El Salvador
|
15 Jun 1995 |
 Eswatini
|
05 Jun 1981 |
 France
|
29 Mar 1954 |
 Gabon
|
13 Jun 1961 |
 Germany
|
25 Feb 1954 |
 Grenada
|
09 Jul 1979 |
 Guatemala
|
04 Aug 1961 |
 Guinea
|
12 Dec 1966 |
 Hungary
|
18 Jun 1969 |
 Ireland
|
22 Jun 1978 |
 Italy
|
05 May 1971 |
 Kenya
|
09 Feb 1971 |
 Malta
|
28 Nov 1969 |
 Mauritius
|
02 Dec 1969 |
 Mexico
|
23 Aug 1952 |
 Morocco
|
14 Oct 1960 |
 Netherlands
|
11 Jun 1954 |
 New Zealand
|
01 Jul 1952 |
 Papua New Guinea
|
01 May 1976 |
 Paraguay
|
24 Jun 1964 |
 Peru
|
01 Feb 1960 |
 Philippines
|
29 Dec 1953 |
 Poland
|
05 Jul 1977 |
 Republic of Moldova
|
04 Apr 2003 |
 Senegal
|
22 Oct 1962 |
 Seychelles
|
06 Feb 1978 |
 Sierra Leone
|
13 Jun 1961 |
 Slovakia
|
01 Jan 1993 |
 Spain
|
04 Jun 1970 |
 Sri Lanka
|
05 Apr 1954 |
 Syrian Arab Republic
|
10 Aug 1965 |
 Tunisia
|
12 Jan 1959 |
 Turkey
|
23 Jun 1970 |
 Uruguay
|
18 Mar 1954 |
 Zambia
|
20 Jun 1972 |
 Zimbabwe
|
16 Sep 1993 |