Chapter 11 – War crimes and crimes against humanity
Section 5 - War crime
(2) Also a person who commits another act defined under article 8 of the Rome Statute of the International Criminal Court (Treaties of Finland 56/2002) or in another manner violates the provisions of an international agreement on war, armed conflict or occupation that is binding on Finland or the generally recognized and established laws and customs of war in accordance with international law shall be sentenced for a war crime.
Attacking or bombarding towns, villages, dwellings or buildings which are undefended and which are not military objectives - IAC
Conscripting children under 15 into armed forces or groups - NIAC
Conscripting children under 15 into the national armed forces - IAC
Declaring abolished, suspended or inadmissible in a court of law the rights and actions of the nationals of a hostile party - IAC
Denial of quarter - IAC
Denial of quarter - NIAC
Enlisting children under 15 into armed forces or groups - NIAC
Enlisting children under 15 into the national armed forces - IAC
Inhuman treatment - IAC
Killing or wounding a combatant who has laid down his arms and surrendered at discretion - IAC
Killing or wounding a combatant who no longer has means of defence and has surrendered at discretion - IAC
Transferring own civilians into occupied territory - IAC
Transferring population of an occupied territory - IAC
Using children under 15 to participate actively in hostilities - IAC
Using children under 15 to participate actively in hostilities - NIAC
EDIT.