''Chapter II: Fundamental Rights and Freedoms, Article 33: The Principle of Legality and Proportionality in Criminal Cases''
2.No punishment for a criminal act shall exceed the penalty provided by law at the time the criminal act was committed.
Article 2 Principle of legality
1. Criminal offenses, criminal sanctions and measures of mandatory treatment are defined only by law.
A person convicted by the Court may be punished only in accordance with this Statute.