The Assembly shall meet not less than once in three years and shall be convened by the Council at a suitable time and place. An extraordinary meeting of the Assembly may be held at any time upon the call of the Council or at the request of not less than one-fifth of the total number of contracting States addressed to the Secretary General.
 
  
  
  
38th SessionMontréal24 September - 4 October 2013
37th SessionMontréal28 September - 8 October 2010
36th SessionMontréal18 - 28 September 2007
35th SessionMontreal28 September - 8 October 2004
34th Session (Extraordinary)Montreal31 March and 1 April 2003
33rd SessionMontreal25 September - 5 October 2001
32nd SessionMontreal22 September - 2 October 1998
31st SessionMontreal19 September - 4 October 1995
30th Session (Extraordinary)Montreal25 and 26 May 1993
29th SessionMontreal22 September - 8 October 1992
28th Session (Extraordinary)Montreal22 - 26 October 1990
27th SessionMontreal19 September - 6 October 1989
26th SessionMontreal23 September - 10 October 1986
25th Session (Extraordinary)Montreal24 April - 10 May 1984
24th SessionMontreal20 September - 7 October 1983
23rd SessionMontreal16 September - 7 October 1980
22nd SessionMontreal13 September - 4 October 1977
21st SessionMontreal24 September - 15 October 1974
20th Session (Extraordinary)Rome28 August - 21 September 1973
19th Session (Extraordinary)New York27 February - 2 March 1973
18th SessionVienna15 June - 7 July 1971
17th-A Session (Extraordinary)New York11 and 12 March 1971
17th Session (Extraordinary)Montreal16 - 30 June 1970
16th SessionBuenos Aires3 - 26 September 1968
15th SessionMontreal22 June - 16 July 1965
14th SessionRome21 August - 15 September 1962
13th Session (Extraordinary)Montreal19 - 21 June 1961
12th SessionSan Diego16 June - 9 July 1959
11th SessionMontreal20 May - 2 June 1958
10th SessionCaracas19 June - 16 July 1956
9th SessionMontreal31 May - 13 June 1955
8th SessionMontreal1 - 14 June 1954
7th SessionBrighton16 June - 6 July 1953
6th SessionMontreal27 May - 12 June 1952
5th SessionMontreal5 - 18 June 1951
4th SessionMontreal30 May - 20 June 1950
3rd SessionMontreal7 - 20 June 1949
2nd SessionGeneva1 - 21 June 1948
1st SessionMontreal6 - 27 May 1947
PICAO First InterimMontreal21 May - 7 June 1946