Chapter II. General Conditions for Imposition of Penalties.
Art. 15
A person who was, at the time an act was committed, totally unable to control his/her actions on account of mental disease, retardation or deterioration, or on account of impaired consciousness or other similar condition, shall not be punished.
Art. 16
A mentally deranged person, such as on account of retardation, deterioration, sexual abnormality or other disturbance, without this condition being as serious as defined in Art. 15, shall be punished if punishment is, under the circumstances and after medical opinion has been sought, deemed likely to reap results.
If an institution for persons mentioned in this Article comes into being, a Criminal Judgment may provide that the offender may serve his/her [punishment] there.
Incapacity - national proceedings
Insanity - national proceedings
Mental disease or defect - national proceedings
EDIT.