Part II – International Crimes and Offences Against The Administration of Justice
General Principles of Criminal Law
19. General principles of criminal law.
(1) For the purposes of proceedings for an offence against section 7 or section 8 or section 9 –
(a) the following provisions of the Statute apply, with any necessary modifications –
(ix) article 31 (which specifies grounds for excluding criminal responsibility);
Incapacity - national proceedings
Insanity - national proceedings
Mental disease or defect - national proceedings
Intoxication - national proceedings
Necessity - national proceedings
Self-defence - national proceedings
Duress - national proceedings
EDIT.