29Mental impairment and other defences

29 Mental impairment and other defences (1) A person cannot rely on a mental impairment to deny voluntariness or the existence of a fault element, but may rely on mental impairment to deny criminal responsibility. (2) If the trier of fact is satisfied that a person carried out conduct because of a delusion caused by a mental impairment, the delusion itself cannot be relied on as a defence, but the person may rely on the mental impairment to deny criminal responsibility.