1949 Decision of the International Law Commission to award priority to
the topic following its survey of the whole field of international law with a view to selecting topics for codification, in pursuance of article 18 of its Statute.
- Proposed draft Convention on the Law of Treaties, together with an explanatory note by the Special Rapporteur, and commentaries.
- Report of the Special Rapporteur, James L. Brierly (2nd session of the ILC (1950)
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- Several draft articles on the conclusion of treaties (art.1), entry into force of treaties (art.2), application of treaties (art.3), ratification of treaties (art.4), when ratification is necessary (art.5), date of entry into force of treaties (art.6), obligation of a signatory prior to the entry into force of a treaty (art.7), no obligation to ratify (art.8), accession to treaties (art.9), together with commentaries.
- Report of the Special Rapporteur, James L. Brierly (3rd session of the ILC (1951))
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- Articles tentatively adopted by the Commission at its third session with commentaries thereon: capacity to make treaties (art.1), competence of Head of State (art.2), establishment of the text of treaties (art.3), assumption of treaty obligations (art.4), ratification of treaties (art.5), when ratification is necessary (art.6), no obligation to ratify (art.7), entry into force of treaties (art.8), accession to treaties (art.9), acceptance (art.10).
- Report of the Special Rapporteur, James L. Brierly (4th session of the ILC (1952))
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- Text of articles with commentaries divided into the following parts: definition and nature of treaties (part I), conclusion of treaties (part II), Conditions of validity of treaties (part III). Part III is subdivided into the following sections: capacity of the parties and their agents (sec.I), reality of consent (sec.II), legality of the object of the treaty (sec.III), and form and publicity (sec.IV).
- Report of the Special Rapporteur, Sir Hersch Lauterpacht (5th session of the ILC (1953))
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- Further texts of revised articles 1 (essential requirements of a treaty), 6 (ratification), 7 (accession), 9 (reservations), and 16 (consistency with prior treaty obligation), with commentaries.
- Report of the Special Rapporteur, Sir Hersch Lauterpacht (6th session of the ILC (1954))
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- Set of draft articles concentrating on the topic of the framing and conclusion of treaties as well as a section devoted to certain basic principles of treaty law, with commentaries.
- Report of the Special Rapporteur, Sir Gerald Fitzmaurice (8th session of the ILC (1956))
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- Part III of the proposed first chapter of the envisaged code on treaty law, dealing with temporal validity (duration, termination, revision and modification of treaties), with commentaries.
- Second Report of the Special Rapporteur, Sir Gerald Fitzmaurice (9th session of the ILC (1957))
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- Part II of the proposed first chapter of the envisaged code on treaty law, dealing with essential validity (intrinsic legality and operative force of treaties), with commentaries.
- Third Report of the Special Rapporteur, Sir Gerald Fitzmaurice, (10th session of the ILC (1958))
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- Turned to the proposed second chapter (the effects of treaties), and considered part I, vol. Iz. The effects of treaties as between the parties (operation, execution and enforcement), with commentaries.
- Fourth Report of the Special Rapporteur, Sir Gerald Fitzmaurice, (11th session of the ILC (1959))
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- Part II of the proposed second chapter (effects of treaties) on the effects of treaties in relation to third States with commentaries.
- Fifth Report of the Special Rapporteur, Sir Gerald Fitzmaurice, (12th session of the ILC (1960))
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- Twenty-three draft articles on the conclusion, entry into force and registration of treaties together with commentaries.
- First Report of the Special Rapporteur, Sir Humphrey Waldock, (14th session of the ILC (1962))
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- Part II (Arts. 30–54) of the draft articles on the essential validity, duration and termination of treaties.
- Second Report of the Special Rapporteur, Sir Humphrey Waldock (15th session of the ILC (1963))
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- Part III (Arts. 55-) of the draft articles on the application, effects, revision and interpretation of treaties.
- Third Report of the Special Rapporteur, Sir Humphrey Waldock (16th session of the ILC (1964))
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- Summary of comments of Governments and delegations on the twenty-nine articles of part I and first three articles of part II and proposals for the revision of the articles in the light of those comments.
- Fourth Report of the Special Rapporteur, Sir Humphrey Waldock (First part of the 17th session of the ILC (1965))
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- Revision of Part II, sections 1–3 of the draft articles.
- Fifth Report of the Special Rapporteur, Sir Humphrey Waldock (Second part of the 17th session of the ILC (1966))
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- Revision of Part II, section 4 and Part III of the draft articles.
- Sixth Report of the Special Rapporteur, Sir Humphrey Waldock (18th session of the ILC (1966))
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- Report of the International Law Commission on the work of its first session, 12 April to 19 June 1949
- Appointed James L. Brierly as Special Rapporteur with a view to preparing a working paper for submission to the Commission at its second session.
- Discussion in Plenary: 33rd meeting (3 June 1949)
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- Report of the International Law Commission on the work of its second session, 5 June to 29 July 1950
- The Commission undertook its consideration of the topic on the basis of the report of the Special Rapporteur and the replies of Governments to a questionnaire addressed to them. It considered the scope of the subject to be covered in its study. Provisionally decided that exchange of notes should be covered. A majority favoured the inclusion in its study of agreements to which international organizations are parties. There existed a divergence of views on the effect of constitutional provisions as to the exercise of capacity to make treaties. The Commission also discussed the part of the report dealing with reservations. The Special Rapporteur was requested to continue his work in the light of the discussions and to submit further reports at the next session.
- Discussion in plenary: 49th, 50th, 51st, 52nd and 53rd meetings (19 to 23 June 1950)
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- Report of the International Law Commission on the work of its third session, 16 May to 27 July 1951
- The Commission considered the draft articles contained in the Special Rapporteur's second report as well as some others in his first report. Various amendments were adopted and tentative texts were provisionally agreed upon. These texts were referred to the Special Rapporteur who was requested to present to the Commission, at its fourth session, a final draft, together with a commentary thereon. The Special Rapporteur was also requested to do further work on the topic of the law of treaties as a whole and to submit a report thereon to the Commission.
- Discussion in Plenary: 84th, 85th, 86th, 87th and 88th meetings (18 to 24 May 1951), and 98th, 99th, 100th,102nd, 103rd, 104th, 105th and 106th, meetings (7 to 19 June 1951)
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- ILC Report, A/1858 (A/6/9), 1951, chap. VI, paras. 72–75
- Yearbook, 1951, vol. II
- A/CN.4/L.28 (in Yearbook, 1951, vol. II)
- Yearbook, 1951, vol. I
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- Report of the International Law Commission on the work of its fourth session, 4 June to 8 August 1952
- The Commission had before it the third report of the Special Rapporteur. However, owing to his resignation from membership in the Commission, it did not consider it expedient to discuss the report. Mr. H. Lauterpacht was elected Special Rapporteur on the law of treaties, to succeed Mr. Brierly, and was requested to present a report at its fifth session in 1953.
- Discussion in Plenary: 178th and 179th meetings (1 to 4 August 1952)
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- Report of the International Law Commission on the work of its fifth session, 1 June to 14 August 1953
- The Commission decided to request the Special Rapporteur, Mr. H. Lauterpacht, to continue his work on the subject and to present a further report for discussion at the next session together with the report held over from the present session.
- Discussion in Plenary: 227th meeting (30 July 1953)
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- Report of the International Law Commission on the work of its sixth session, 3 June to 28 July 1954
- The two reports on the law of treaties submitted by the Special Rapporteur, Mr. Hersch Lauterpacht, were held over for consideration at the next session.
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- Report of the International Law Commission on the work of its seventh session, 2 May to 8 July 1955
- Following the resignation of Sir Hersch Lauterpacht, Sir Gerald Fitzmaurice was appointed Special Rapporteur on the Law of Treaties.
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- Report of the International Law Commission on the work of its eighth session, 23 April to 4 July 1956
- Owing to a lack of time, the Commission was unable to enter upon a full discussion of the report. It did, however, consider certain general questions placed before it by the Special Rapporteur regarding the form and scope of the codification envisaged in this field. The Special Rapporteur was requested to continue his work in the light of the debate.
- Discussion in plenary: 368th, 369th and 370th meetings (15 to 19 June 1956)
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- Report of the International Law Commission on the work of its ninth session, 23 April to 28 June 1957
- Due to a lack of time, the Commission was unable to consider the second report of the Special Rapporteur.
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- Report of the International Law Commission on the work of its tenth session, 28 April to 4 July 1958
- Due to a lack of time, the Commission was unable to consider the third report of the Special Rapporteur.
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- Report of the International Law Commission on the work of its eleventh session, 20 April to 26 June 1959
- On the basis of the first report of the Special Rapporteur, Sir Gerald Fitzmaurice, the Commission prepared the text of draft articles 1 to 10 (introductory articles) and 14 to 17 (section B: conclusion of and participation in the Treaty and its entry into force), together with commentaries.
- Discussion in plenary: 480th, 481st, 482th, 483rd, 484th, 485th, 486th, 487th, 488th, 489th, 490th, 491st, 492nd, 493rd, 494th, 495th and 496th meetings (21 April to 19 May 1959), and 500th, 501st, 502nd, 503rd and 504th meetings (25 to 29 May 1959)
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- Report of the International Law Commission on the work of its twelfth session, 25 April to 1 July 1960
- The Commission did not take up the topic during the session.
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- Report of the International Law Commission on the work of its thirteenth session, 1 May to 7 July 1961
- Following the resignation of Sir Gerald Fitzmaurice, the Commission appointed Sir Humphrey Waldock as Special Rapporteur for the law of treaties. The Commission decided i) that its aim would be to prepare draft articles on the law of treaties intended to serve as the basis for a convention; ii) that the Special Rapporteur should be requested to re-examine the work previously done in this field by the Commission and its Special Rapporteurs; and iii) that the Special Rapporteur should begin with the question of the conclusion of treaties and then proceed with the remainder of the subject, if possible covering the whole subject in two years.
- Discussion in plenary: 620th and 621st meetings (28 to 29 June 1961)
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- Report of the International Law Commission on the work of its fourteenth session, 24 April to 29 June 1962
- The Commission adopted a provisional draft of articles on the conclusion, entry into force and registration of treaties (together with commentaries) based on the first report of the Special Rapporteur, Sir Humphrey Waldock. The Commission decided to transmit its draft, through the Secretary-General, to Governments for their observations.
- Discussion in plenary: 637th, 638th, 639th, 640th, 641st, 642nd, 643rd, 644th, 645th, 646th, 647th, 648th, 649th, 650th, 651st, 652nd, 653rd, 654th, 655th, 656th, 657th, 658th, 659th, 660th, 661st, 662nd, 663rd, 664th, 665th, 666th, 667th, 668th, 669th, 670th, and 672nd meetings (7 May to 29 June 1962)
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- Report of the International Law Commission on the work of its fifteenth session, 6 May to 12 July 1963
- Provisionally adopted part II of the draft articles (Arts. 30–54) on invalidity and termination of treaties, with commentaries.
- Discussion in Plenary: 673rd, 674th, 675th, 676th, 677th, 678th, 679th, 680th, 681st, 682nd, 683rd, 684th and 685th meetings (6 to 22 May 1963), 687th, 688th, 689th, 690th, 691st, 692nd, 693rd, 694th, 695th, 696th, 697th, 698th, 699th, 700th, 701st, 702nd, 703rd, 704th, 705th, 706th, 707th, 708th, 709th, 710th and 711th meetings (27 May to 1 July 1963), 714th meeting (4 July 1963), and 716th, 717th and 718th meetings (8 to 10 July 1963)
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- Report of the International Law Commission on the work of its sixteenth session, 11 May to 24 July 1964
- Provisionally adopted part II of the draft articles (Arts. 55ff) on application, effects, modification and interpretation of treaties, with commentaries.
- Discussion in Plenary: 726th, 727th, 728th, 729th, 730th, 731st, 732nd, 733rd, 734th, 735th, 736th, 737th, 738th, 739th, 740th, 741st, 742nd, 743rd, 744th, 745th, 746th, 747th, 748th, 749th, 750th, 751st, 752nd, 753rd, 754th and 755th meetings (19 May–30 June 1964), 759th and 760th meetings (6 and 7 July 1964) 764th, 765th, 766th and 767th meetings (13 to 16 July 1964), and 769th and 770th meetings (17 and 20 July 1964)
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- Report of the International Law Commission on the work of its seventeenth session, 3 May to 9 July 1965
- Re-examined the first twenty-nine articles of the draft in light of the comments of Governments.
- Discussion in Plenary: 776th, 777th, 778th, 779th, 780th, 781st, 782nd, 783rd, 784th, 785th, 786th, 787th, 788th, 789th, 790th, 791st, 792nd, 793rd, 794th, 795th, 796th, 797th, 798th, 799th, 800th, 801st, 802nd and 803rd meetings (4 May to 16 June 1965), 810th, 811th, 812th, 813th, 814th, 815th and 816th meetings (24 June to 2 July 1965), and 820th meeting (8 July 1965)
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- Reports of the International Law Commission on the second part of its seventeenth session 3–28 January 1966 and on its eighteenth session 4 May–19 July 1966
- Adopted draft articles, with commentaries.
- Discussion in Plenary (second part of 17th session): 822nd, 823rd, 824th, 825th, 826th, 827th, 828th, 829th, 830th, 831st, 832nd, 833rd, 834th, 835th, 836th, 837th, 838th, 839th, 840th, 841st, 842nd and 843rd meetings (3 to 28 January 1966)
- Discussion in Plenary (18th session): 845th, 846th, 847th, 848th, 849th, 850th, 851st, 852nd, 853rd, 854th, 855th, 856th, 857th, 858th, 859th, 860th, 861st, 862nd, 863rd, 864th, 865th, 866th, 867th, 868th, 869th, 870th, 871st, 872nd, 873rd, 874th, 875th and 876th meetings (5 May to 23 June 1966), 879th and 880th meetings (28 and 29 June 1966), and 883rd, 884th, 885th, 886th and 887th meetings (4 to 11 July 1966)
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- ILC Report, A/6309/Rev.1 (A/21/9), 1966, part I(E), paras. 11–12, and part II, chap. II, paras. 9–38
- Yearbook, 1966, vol. II
- Yearbook, 1966, vol. I(I)
- Yearbook, 1966, vol. I(II)
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