''Chapter II: Fundamental Rights and Freedoms, Article 33: The Principle of Legality and Proportionality in Criminal Cases''
1.No one shall be charged or punished for any act which did not constitute a penal offense under law at the time it was committed, except acts that at the time they were committed constituted genocide, war crimes or crimes against humanity according to international law.
1. A person shall not be criminally responsible under this Statute unless the conduct in question constitutes, at the time it takes place, a crime within the jurisdiction of the Court.
2. The definition of a crime shall be strictly construed and shall not be extended by analogy. In case of ambiguity, the definition shall be interpreted in favour of the person being investigated, prosecuted or convicted.
3. This article shall not affect the characterization of any conduct as criminal under international law independently of this Statute.