BOOK I-GENERAL PART
TITLE I-THE CRIMINAL LAW
SINGLE CHAPTER-GENERAL PRINCIPLES
Article 5
Acts occurred abroad
1-c) By Portuguese, or by foreigners against Portuguese, whenever:
I) The agents are found in Portugal;
II) When they are also punishable by the law of the place in which they have been perpetrated, except when in that territory punitive power is not exerted; and
III) When they are considered a crime admitting extradition and this cannot be conceded;
Protective jurisdiction
Nationality jurisdiction - national proceedings
EDIT.