Chapter II
Crimes
Section II
War crimes
Article 10
War crimes against persons
1. Anyone who, in the context of an international armed conflict or a non-international armed conflict, commits any of the following acts against a person protected by international humanitarian law:
(h) Conscripting or enlisting children into a State’s armed forces or military or paramilitary forces, or into armed groups other than a State’s armed forces or military or paramilitary forces, or using them to participate in hostilities;
shall be punished with a term of imprisonment of 10 to 25 years.
Conscripting children under 15 into armed forces or groups - NIAC
Conscripting children under 15 into the national armed forces - IAC
Enlisting children under 15 into armed forces or groups - NIAC
Enlisting children under 15 into the national armed forces - IAC
Using children under 15 to participate actively in hostilities - IAC
Using children under 15 to participate actively in hostilities - NIAC
EDIT.