OFFENCES OUTSIDE CANADA
6. Interpretation -- crimes against humanity
(5) For greater certainty, the offence of crime against humanity was part of
customary international law or was criminal according to the general principles of law
recognized by the community of nations before the coming into force of either of the
following:
(a) the Agreement for the prosecution and punishment of the major war criminals
of the European Axis, signed at London on August 8, 1945; and
(b) the Proclamation by the Supreme Commander for the Allied Powers, dated
January 19, 1946.
EDIT.