§ 2. Crimes
Section 5
5. Anyone who, in the case of an international armed conflict, commits one of the following acts:
(r) conscripting or enlisting children under the age of fifteen years into the national armed forces or armed groups or using them to participate actively in hostilities;
shall be liable to a term of imprisonment not exceeding fifteen years or a fifth category fine.

Article 8
War crimes
2. For the purpose of this Statute, "war crimes" means:
(b) Other serious violations of the laws and customs applicable in international armed conflict, within the established framework of international law, namely, any of the following acts:
(xxvi) Conscripting or enlisting children under the age of fifteen years into the national armed forces or using them to participate actively in hostilities

This provision follows the ICC Statute.