An Act to provide for the Trial and Punishment of War Criminals
Part II—Interpretation
(3) A serious crime is a war crime if it was:
(a) committed:
(i) in the course of political, racial or religious persecution; or
(ii) with intent to destroy in whole or in part a national, ethnic, racial or religious group, as such; and
(b) committed in the territory of a country when the country was involved in a war or when territory of the country was subject to an occupation.
Intent to destroy, in whole or in part, a national, ethnical, racial or religious group
EDIT.