BOOK II
SPECIAL PART
TITLE I
CRIMES AGAINST PEACE AND HUMANITY
CHAPTER IV
COMMON PROVISIONS
Article 137. Definitions
For the purposes of this Title, the following definitions are considered :
b) "Armed conflict of a non-international nature" is one which is fought within the territory of a State, is of a prolonged nature, where there is opposition between governmental authorities and organized armed groups, or a conflict fought among the latter, exception being made to situations of internal unrest or tension, such as sporadic or isolated acts of violence or others of a similar nature ;
EDIT.