Rwanda
Practice Relating to the Use of Prohibited Weapons
Rwanda’s Law Repressing the Crime of Genocide, Crimes against Humanity and War Crimes (2003) provides:
Article: 13
Shall be punished by an imprisonment sentence of seven (7) to twenty (20) years any person who employs or orders to employ against the enemy methods and means of warfare expressly prohibited by the laws and customs applicable in armed conflicts as well as the international conventions to which Rwanda is a party.
When methods and means employed or ordered to be employed have resulted in the death of one or more persons, the culprit shall be punished by life imprisonment or the death penalty. 
Rwanda, Law Repressing the Crime of Genocide, Crimes against Humanity and War Crimes, 2003, Article 13.