Finland
Practice Relating to Rule 157. Jurisdiction over War Crimes
Finland’s Revised Penal Code (1995) provides for the punishment of “war crimes”, “aggravated war crimes” and “petty war crimes”.
The Code further states:
Finnish law shall apply to an offence committed outside of Finland where the punishability of the act, regardless of the law of the place of commission, is based on an international agreement binding on Finland or on another statute or regulation internationally binding on Finland (international offence).
Finland’s Criminal Code (1889), as amended in 2008, states:
Section 7 - International offence
(1) Finnish law applies to an offence committed outside of Finland where the punishability of the act, regardless of the law of the place of commission, is based on an international agreement binding on Finland or on another statute or regulation internationally binding on Finland (
international offence). Further provisions on the application of this section shall be issued by Decree.

[emphasis in original]