Chapter Two : Fundamental Rights and Duties of Citizens

Article Twenty-Seven

No deed shall be considered a crime unless ruled by a law promulgated prior to commitment of the offense. No one shall be pursued, arrested, or detained without due process of law. No one shall be punished without the decision of an authoritative court taken in accordance with the provisions of the law, promulgated prior to commitment of the offense.

Chapter 1 General Principles and Definitions

Article 3 Punishment Under Law Enforced Before Commission of Act

No one can be punished but in accordance with the provisions of the law which:has been enforced before commitment of the act under reference.