Part 1
Introductory
Interpretation: Application: General Principles
Chapter 5
Criminal Responsibility
32. A person is not criminally responsible for an act or omission if he does or omits to do the act under any of the following circumstances -
(2) in obedience of the order of a competent authority which he is bound by law to obey, unless the order is manifestly unlawful ;
Manifestly unlawful order
Superior orders - national proceedings
EDIT.