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.
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.