28

Article 28 (Principle of Legality in Criminal Law) No one may be punished for an act which had not been declared a criminal offence under law, or for which a penalty had not been prescribed, at the time the act was performed. Acts that are criminal shall be established and the resulting penalties pronounced according to the law that was in force at the time the act was performed, save where a more recent law adopted is more lenient towards the offender.