''CHAPTER II. PROTECTION OF FUNDAMENTAL HUMAN RIGHTS AND FREEDOMS, 12. Right to fair trial, etc''
(4) No person shall be held to be guilty of a criminal offence on account of any act or omission that did not, at the time it took place, constitute such an offence, and no penalty shall be imposed for a criminal offence that is severer in degree or description than the maximum penalty that might have been imposed for that offence at the time when it was committed.

CHAPTER II PROTECTION OF FUNDAMENTAL HUMAN RICHTS FREEDOMS

12. Right to fair trial, etc.

(4) No person shall be held to be guilty of a criminal offence on account of any act or omission that did not, at the time it took place, constitute such an offence, and no penalty shall be imposed for a criminal offence that is severer in degree or description than the maximum penalty that might have been imposed for that offence at the time when it was committed.

PART I - GENERAL PRINCIPLES

Application
2. (2) No person shall be tried, convicted or punished for an offence other than an offence specified in this Code or in any other written law or statute in force in Lesotho.