An Act to provide for the Trial and Punishment of War Criminals#
Part II—Interpretation
7 War crimes
(1) A serious crime is a war crime if it was committed:
(c) in pursuing a policy associated with the conduct of a war or with an occupation; or
(d) on behalf of, or in the interests of, a power conducting a war or engaged in an occupation.
Part of plan or policy - war crimes
EDIT.