First Book
General Provisions
Section Three
CHAPTER SEVEN
Plurality of Crime and Its Effect on Punishment
Article 159 :
When a person is convicted for committing a crime and later is sentenced to punishments for committing another crime, both punishments shall be implemented one after the other, even if the total period of imprisonment exceeds twenty years.
Enforcement of sentences imposed
National procedures re enforcement of sentences imposed
Enforcement of sentence of imprisonment
EDIT.