Criminal Code of Canada
Part 1- General
16. (1) No person is criminally responsible for an act committed or an omission made while suffering from a mental disorder that ren¬dered the person incapable of appreciating the nature and quality of the act or omission or of knowing that it was wrong.
(2) Every person is presumed not to suffer from a mental disorder so as to be exempt from criminal responsibility by virtue of subsection (1), until the contrary is proved on the balance of probabilities.
(3) The burden of proof that an accused was suffering from a mental disorder so as to be exempt from criminal responsibility is on the party that raises the issue.
Incapacity - national proceedings
Insanity - national proceedings
Mental disease or defect - national proceedings
EDIT.