Chapter II
Crimes
Section II
War crimes
Article 11
War crimes involving the employment of prohibited methods of war
Anyone who, in the context of an international armed conflict or a non-international armed conflict:
(c) Attacks, by whatever means, population centres, dwellings or buildings that are undefended and that are not military objectives;
shall be punished with a term of imprisonment of 10 to 25 years.
EDIT.