Chapter 1 - Scope of application of the criminal law of Finland
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.
(2) Regardless of the law of the place of commission, Finnish law applies also to a nuclear explosive offence or the preparation of an endangerment offence that is to be deemed an offence referred to in the Comprehensive Nuclear Test Ban Treaty (Treaties of Finland 15/2001) (841/2003).
(3) Regardless of the law of the place of commission, Finnish law applies also to trafficking in persons, aggravated trafficking in persons and an offence referred to in chapter 34a committed outside of Finland. (650/2004)
EDIT.