| Entry into force: | 11 December 1946, in accordance with article VII (1). |
| Registration: | 3 February 1948, No. 186. |
| Status: | Signatories: 25 ,Parties: 62. |
| Text: | United Nations, Treaty Series, vol. 12, p. 179. |
Note: The Protocol was approved by the General Assembly of the United Nations in resolution 54 (I)1of 19 November 1946.
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| Agreement concerning the Suppression of the Manufacture of, Internal Trade in, and Use of, Prepared Opium (with Protocol, signed at Geneva on 11 February 1925. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 27 Oct 1947 |
| International Opium Convention (with Protocol), signed at Geneva on 19 February 1925. . . . . . . . . . . . . . . . . . . | 3 Feb 1948 |
| Convention for Limiting the Manufacture and Regulating the Distribution of Narcotic Drugs (with Protocol of Signature), signed at Geneva on 13 July 1931 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 21 Nov 1947 |
| Agreement concerning the Suppression of Opium Smoking, signed at Bangkok on 27 November 1931 . . . . . . | 27 Oct 1947 |
| Convention for the Suppression of the Illicit Traffic in Dangerous Drugs, signed at Geneva on 26 June 1936. . | 10 Oct 1947 |
| Participant | Signature | Definitive signature (s), Acceptance (A), Succession (d) |
| Afghanistan | 11 Dec 1946 s | |
| Albania | 23 Jun 1947 A | |
| Argentina | 11 Dec 1946 s | |
| Australia | 11 Dec 1946 | 28 Aug 1947 A |
| Austria | 17 May 1950 A | |
| Bahamas | 13 Aug 1975 d | |
| Belarus | 11 Dec 1946 s | |
| Belgium | 11 Dec 1946 s | |
| Bolivia | 11 Dec 1946 s | |
| Brazil | 17 Dec 1946 s | |
| Canada | 11 Dec 1946 s | |
| Chile | 11 Dec 1946 s | |
| China4 | 11 Dec 1946 s | |
| Colombia | 11 Dec 1946 s | |
| Costa Rica5 | 11 Dec 1946 | |
| Cuba | 12 Dec 1946 | |
| Czech Republic3 | 30 Dec 1993 d | |
| Denmark5 | 11 Dec 1946 | 15 Jun 1949 A |
| Dominican Republic | 11 Dec 1946 s | |
| Ecuador | 14 Dec 1946 | 8 Jun 1951 A |
| Egypt5 | 11 Dec 1946 | 13 Sep 1948 A |
| Fiji | 1 Nov 1971 d | |
| Finland | 3 Feb 1948 A | |
| France5 | 11 Dec 1946 | 10 Oct 1947 A |
| Germany6,7 | 12 Aug 1959 A | |
| Greece5 | 11 Dec 1946 | 21 Feb 1949 A |
| Guatemala5 | 13 Dec 1946 | |
| Haiti | 14 Dec 1946 | 31 May 1951 A |
| Honduras | 11 Dec 1946 s | |
| Hungary | 16 Dec 1955 A | |
| India | 11 Dec 1946 s | |
| Iran (Islamic Republic of) | 11 Dec 1946 s | |
| Iraq5 | 12 Dec 1946 | 14 Sep 1950 A |
| Ireland | 18 Feb 1948 A | |
| Italy | 25 Mar 1948 s | |
| Japan | 27 Mar 1952 A | |
| Lebanon | 13 Dec 1946 s | |
| Liberia | 11 Dec 1946 s | |
| Liechtenstein8 | 25 Sep 1947 A | |
| Luxembourg5 | 11 Dec 1946 | 13 Oct 1949 A |
| Mexico | 11 Dec 1946 s | |
| Monaco | 21 Nov 1947 s | |
| Netherlands5 | 11 Dec 1946 | 10 Mar 1948 A |
| New Zealand | 11 Dec 1946 s | |
| Nicaragua | 13 Dec 1946 | 24 Apr 1950 A |
| Norway5 | 11 Dec 1946 | 2 Jul 1947 A |
| Panama | 15 Dec 1946 s | |
| Papua New Guinea | 28 Oct 1980 d | |
| Paraguay | 14 Dec 1946 | |
| Peru | 26 Nov 1948 | |
| Philippines5 | 11 Dec 1946 | 25 May 1950 A |
| Poland | 11 Dec 1946 s | |
| Romania | 11 Oct 1961 A | |
| Russian Federation | 11 Dec 1946 | 25 Oct 1947 A |
| Saudi Arabia | 11 Dec 1946 s | |
| Slovakia3 | 28 May 1993 d | |
| South Africa5 | 15 Dec 1946 | 24 Feb 1948 A |
| Spain | 26 Sep 1955 s | |
| Sweden | 17 Oct 1947 s | |
| Switzerland8 | 25 Sep 1947 A | |
| Syrian Arab Republic | 11 Dec 1946 s | |
| Thailand | 27 Oct 1947 s | |
| Turkey | 11 Dec 1946 s | |
| Ukraine | 11 Dec 1946 | 8 Jan 1948 A |
| United Kingdom of Great Britain and Northern Ireland | 11 Dec 1946 s | |
| United States of America | 11 Dec 1946 | 12 Aug 1947 A |
| Uruguay | 14 Dec 1946 | |
| Venezuela | 11 Dec 1946 | |
| Yugoslavia5 | 11 Dec 1946 | 19 May 1948 A |
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1. Official Records of the General Assembly, Second Part of the First Session, Resolutions (A-64-Add.1), p. 81.
2. The Protocol does not contain any formal amendment in respect of the Convention of 23 January 1912. However, its article III provides as follows:
"The functions conferred upon the Netherlands Government under articles 21 and 25 of the International Opium Convention signed at The Hague on 23 January 1912, and entrusted to the Secretary-General of the League of Nations with the consent of the Netherlands Government, by a resolution of the League of Nations Assembly dated 15 December 1920, shall henceforward be exercised by the Secretary-General of the United Nations."
The Convention of 23 January 1912 (which, consequently, was amended in effect by the Protocol of 11 December 1946) has been included in the present chapter.
3. Czechoslovakia had signed the Protocol, definitively, on 11 December 1946. See also note 11 in chapter I.2.
4. See note concerning signatures, ratifications, accessions, etc. on behalf of China (note 4 in chapter I.1).
5. The signature was affixed without reservation as to approval, but the full powers provided for signature subject to this reservation.
6. See note 14 in chapter I.2.
7. In a communication received by the Secretary-General on 22 January 1960, the Government of the Federal Republic of Germany stated that the Protocol "also applies to Land Berlin as from 12 August 1959, i.e., the day on which the Protocol entered into force for the Federal Republic of Germany".
With reference to the above-mentioned statement, communications have been addressed to the Secretary-General by the Governments of Czechoslovakia, Hungary, Poland, Romania, and the Union of Soviet Socialist Republics, on the one hand, and by the Governments of the Federal Republic of Germany, France, the United Kingdom of Great Britain and Northern Ireland and the United States of America, on the other hand. The said communications are identical in essence, mutatis mutandis, to the corresponding ones reproduced in note 4, chapter III.3.
Subsequently, in a communication received by the Secretary-General on 3 October 1990, the Government of Hungary indicated that, the German State having achieved its unity on this day [3 October 1990], it had decided to withdraw, as from that date, the declaration it had made with respect to the notification of extension by the Federal Republic of Germany to Land Berlin. See also note 6 above.
8. The instrument of acceptance of the Protocol by the Government of the Swiss Confederation stipulates that the declaration of acceptance is also valid for the Principality of Liechtenstein.