GENERAL PART
CHAPTER ONE
THE CRIMINAL LAW
FIRST TITLE
APPLICATION, JURISDICTION RATIONE LOCI ET TEMPORIS
Section 2
Jurisdiction ratione temporis ; lex mitior
(1) The penalty and any ancillary measures shall be determined by the law which is in force at the time of the act.
Nullum crimen sine lege
Nulla poena sine lege
EDIT.