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PART 2
SPECIFIC RULES
TITLE 1
PROTECTION OF FUNDAMENTAL RIGHTS AND FREEDOMS OF THE INDIVIDUAL
144. Provision to secure protection of the law.
(4) No person shall be held to be guilty of a criminal offense on account of any act or omission that did not, at the time it took place, constitute such an offense, and no penalty shall be imposed for any criminal offense that is more severe in degree or nature that the most severe penalty that might have been imposed for that offense at the time when it was committed.
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.