Chapter Two – Fundamental Rights and Freedoms

Part Seven: The Right to Judicial and Other Legal Protection

Article 50

(6) The criminal liability of a deed is assessed, and punishment is meted out, according to the law valid at the time when the offense was committed. A more recent law will be applied if it is more favorable for the perpetrator.

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.