Part 1
GENERAL PART
Chapter 1
GENERAL PROVISIONS
ยง 5. Temporal applicability of penal law
(1) A punishment shall be imposed pursuant to the law in force at the time of commission of the act.
(2) An Act which precludes the punishability of an act, mitigates a punishment or otherwise alleviates the situation of a person shall have retroactive effect.
(3) An Act which declares an act as punishable, aggravates a punishment or otherwise exacerbates the situation of a person shall not have retroactive effect.
EDIT.