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PART II
FUNDAMENTAL RIGHTS, DUTIES, LIBERTIES AND GUARANTEES
TITLE II
PERSONAL RIGHTS, FREEDOMS AND GUARANTEES
Section 31 (Application of criminal law)
5. Criminal law shall not be enforced retroactively, except if the new law is in favour of the accused.
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.