I want to know the answer to the following question:
What distinguishes peremptory norms from other principles of customary law?
All the background I'm provided with is that "These are limited to such universally accepted prohibitions as those against the aggressive use of force, genocide and other crimes against humanity, piracy, hostilities directed at civilian population, racial discrimination and apartheid, slavery and torture, meaning that no state can legally assume an obligation to commit or permit such acts.". Is that enough to answer the question?
Answer: no