Chapter II
Crimes
Section I
Crime of genocide and crimes against humanity
Article 9
Crimes against humanity
Anyone who commits any of the following acts as part of a widespread or systematic attack directed against any civilian population:
(j) Apartheid, which means any inhumane act committed in the context of an institutionalized regime of systematic oppression and domination by one racial group over any other racial group or groups and committed with the intention of maintaining that regime;
shall be punished with a term of imprisonment of 12 to 25 years.
Apartheid - crimes against humanity
EDIT.