§ 2. Crimes
Section 5
3. Anyone who commits, in the case of an international armed conflict, one of the following acts:
(a) rape, sexual slavery, enforced prostitution, enforced sterilisation or any other form of sexual violence which can be deemed to be of a gravity comparable to a grave breach of the Geneva Conventions;
shall be liable to life imprisonment or a term of imprisonment not exceeding thirty years or a sixth 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:
(xxii) Committing rape, sexual slavery, enforced prostitution, forced pregnancy, as defined in article 7, paragraph 2 (f), enforced sterilization, or any other form of sexual violence also constituting a grave breach of the Geneva Conventions

This provision follows the ICC Statute.