BOOK I.
General Provisions.
CHAPTER VI
Conjunction of punishable acts.
Article 65.
(1) In case of conjunction of more acts which must be considered as separate acts and which form more crimes on which similar basic punishments are imposed, one punishment shall be imposed.
(2) The maximum of this punishment shall be the collective total of the maximum punishments imposed on the acts, but not exceeding one third beyond the most severe maximum punishment.
Joint sentence following multiple convictions - national proceedings
EDIT.