''TITLE II: OF THE FREEDOMS, THE RIGHTS AND THE DUTIES OF THE CITIZENS
SUB-TITLE I: OF THE CIVIL AND POLITICAL RIGHTS AND DUTIES, Article 13''
No one may be punished except by virtue of a law promulgated and published prior to the commission of the punishable act.
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.
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.