Соответствующая норма
Practice Relating to Rule 43. Application of General Principles on the Conduct of Hostilities to the Natural Environment
Finland’s Criminal Code (1889), as amended in 2008, provides that any person who “initiates an attack that causes … extensive, long-term and serious environmental damage that [is] clearly excessive in comparison with the anticipated real and direct military benefit” shall be “sentenced for a war crime to imprisonment for at least one year or for life”. 
Finland, Criminal Code, 1889, as amended in 2008, Chapter 11, Section 5(1)(8).
(emphasis in original)