PART TWO--FUNDAMENTAL HUMAN RIGHTS AND FREEDOMS

CHAPTER II--PERSONAL RIGHTS AND FREEDOMS

Article 29

1. No one may be accused or declared guilty of a criminal offense that was not provided for by law at the time of its commission, with the exception of offenses, which at the time of their commission constituted war crimes or crimes against humanity according to international law

Article 11
Jurisdiction ratione temporis
2. If a State becomes a Party to this Statute after its entry into force, the Court may exercise its jurisdiction only with respect to crimes committed after the entry into force of this Statute for that State, unless that State has made a declaration under article 12, paragraph 3.

Article 24
Non-retroactivity ratione personae
1. No person shall be criminally responsible under this Statute for conduct prior to the entry into force of the Statute.
2. In the event of a change in the law applicable to a given case prior to a final judgement, the law more favourable to the person being investigated, prosecuted or convicted shall apply.