Sec. 76 says -- Nothing is an offence which is done by a person who is or who by reason of :

• A. Mistake of fact believes himself to be right to do it.
• B. Mistake of fact believes himself to be bound by law to do it.
• C. Mistake of law in good faith believe himself to be bound by law to do it.
• D. Mistake of fact in good faith believes himself to be bound by law to do it.