PART TWO
HUMAN AND MINORITY RIGHTS AND FREEDOMS

1. Fundamental Principles

Legal certainty in criminal law
Article 34

The penalties shall be determined pursuant to a regulation in force at the time when the act was committed, save when subsequent regulation is more lenient for the perpetrator. Criminal offences and penalties shall be laid down by the law.

PART TWO
HUMAN AND MINORITY RIGHTS AND FREEDOMS

1. Fundamental Principles

Legal certainty in criminal law
Article 34

No person may be held guilty for any act which did not constitute a criminal offence under law or any other regulation based on the law at the time when it was committed, nor shall a penalty be imposed which was not prescribed for this act.

The penalties shall be determined pursuant to a regulation in force at the time when the act was committed, save when subsequent regulation is more lenient for the perpetrator. Criminal offences and penalties shall be laid down by the law.

Article 11
Jurisdiction ratione temporis
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.

Article 24
Non-retroactivity ratione personae
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.