Section I. Criminal Law
Article 5. Retroactivity of Criminal Law
1. A law which eliminates the criminality or punishability of a given act, and which mitigates liability or punishment for it, or which otherwise improves the status of a person who committed it, shall have retroactive force, that is, it shall apply to persons who committed relevant crimes prior to its introduction into effect, including persons who are serving their terms, or have served but still had a conviction on their record.
2. If a new criminal law mitigates punishability of a given act for which a person is serving a term, then the appointed punishment shall be subject to reduction within the sanctions of that newly adopted criminal law.
3. A law, which establishes criminality or punishability of an act, which increases liability or punishment, or otherwise deteriorates the status of a person who committed that act, shall not be retroactive.
EDIT.