CHAPTER III
FUNDAMENTAL RIGHTS
Article 21
a. No person shall be made subject to any law or punishment which was not in effect at the time of commission of an offense, nor shall the Legislature enact any bill of attainder or ex post facto law.
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.