6bProtocol to the International Opium ConventionGeneva, 19 February 192525 September 1928.25 September 1928, No. 18451League of Nations, <i>Treaty Series</i>, vol. 81, p. 357.<i>In accordance with its article 44 (1), the provisions of the Single Convention on Narcotic Drugs, 1961, as amended by the Protocol amending the Single Convention on Narcotic Drugs, 1961 of 8 August 1975, as between the parties thereto, terminates and replaces the provisions of the above Protocol. See chapter VI.18. </i>
Ratifications or definitive accessionsArgentina<right> (Apr 18th, 1946)</right>British Empire<right> (Feb 17th, 1926)</right>(Same reservation as for the Convention.)State of Sarawak<right> (Mar 11th, 1926 a)</right>Bahamas<right> (Oct 22nd, 1926 a) </right>Burma<superscript>2</superscript>Canada<right> (Jun 27th, 1928)</right>Australia<right> (Feb 17th, 1926)</right>New Zealand<right> (Feb 17th, 1926)</right>Union of South Africa<right> (Feb 17th, 1926)</right>India<right> (Feb 17th, 1926)</right>Iraq<right> (Aug 8th, 1931 a)</right>Bolivia<right> (Apr 15th, 1932 a)</right>Bulgaria<right> (Mar 9th, 1927)</right>Chile<right> (Apr 11th, 1933)</right>Colombia<right> (Dec 3rd, 1930 a)</right>Costa Rica<right> (Jan 8th, 1935 a)</right>Cuba<right> (Jul 6th, 1931)</right>Czechoslovakia<superscript>3</superscript><right> (Apr 11th, 1927)</right>Ecuador<right> (Oct 23rd, 1934 a)</right>Egypt<right> (Mar 16th, 1926 a)</right>Estonia<right> (Aug 30th, 1930 a)</right>Finland<right> (Dec 5th, 1927 a)</right>Germany<right> (Aug 15th, 1929)</right>Greece<right> (Dec 10th, 1929)</right>Haiti<right> (Nov 30th, 1938 a)</right>Honduras<right> (Sep 21st, 1934 a)</right>Japan<right> (Oct 10th, 1928)</right>Latvia<right> (Oct 31st, 1928)</right>Luxembourg<right> (Mar 27th, 1928)</right>Netherlands<right> (Jun 4th, 1928)</right>( <i>including Netherlands Indies, Surinam and Curaçao</i> )Portugal<right> (Sep 13th, 1926)</right>Romania<right> (May 18th, 1928 a)</right>Salvador<right> (Dec 2nd, 1926 a)</right>Spain<right> (Apr 19th, 1930 a)</right> <i>Sudan</i> <right> (Feb 20th, 1926)</right>Thailand<right> (Oct 11th, 1929)</right>Turkey<right> (Apr 3rd, 1933 a)</right>Venezuela<right> (Jun 19th, 1929 a)</right>Yugoslavia (former)<superscript>4</superscript><right> (Sep 4th, 1929)</right>
Signatures or accessions not yet perfected by ratificationAlbaniaIranNicaragua
Actions subsequent to the assumption of depositary functions by the Secretary-General of the United Nations
ParticipantSuccession(d)Bahamas13 Aug 1975 dCzech Republic<superscript>3</superscript>30 Dec 1993 dFiji 1 Nov 1971 dPapua New Guinea28 Oct 1980 dSlovakia<superscript>3</superscript>28 May 1993 dTonga 5 Sep 1973 d
1See League of Nations, <i>Treaty Series </i>, vol. 81, p. 357.2See note 1 under “Myanmar” in the “Historical Information” section in the front matter of this volume.3See note 1 under “Czech Republic” and note 1 under “Slovakia” in the “Historical Information” section in the front matter of this volume.4See note 1 under "Bosnia and Herzegovina", "Croatia", "former Yugoslavia", "Slovenia", "The Former Yugoslav Republic of Macedonia" and "Yugoslavia" in the "Historical Information" section in the front matter of this volume.