422. No obligations under customary international law.

Crimes under customary international law of themselves import no legislative, jurisdictional, custodial, prosecutorial or other obligations for states1. States are not obliged by customary international law to ensure that such crimes are punishable under their national law. Equally, while it is likely as a matter of customary international law that states are permitted to extend their criminal jurisdiction over crimes under customary international law on the basis of universality