Aviation : Montreal protocol no. 4 to amend the convention for the unification of certain rules relating to international carriage by air signed at Warsaw on 12 October 1929 as amended by the protocol done at the Hague on 28 September 1955 (with reservation), Montreal, September 25, 1975, signed by Canada September 30, 1975, in force June 14, 1998, ratification by Canada August 27, 1999, in force for Canada November 25, 1999 =

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by Canada. Dept. of Foreign Affairs and International Trade.