Question:medium

'Jus cogens' means:

Updated On: Jul 13, 2026
  • Norms
  • Negotiable norms
  • Non-derogable norms
  • Legal norms
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The Correct Option is C

Solution and Explanation

One good way to identify jus cogens is to remember what happens if a treaty conflicts with it: under Article 53 of the Vienna Convention on the Law of Treaties, such a treaty is void. That consequence only makes sense if the underlying norm cannot be derogated from.

  1. Norms: is far too broad, plenty of international norms can be changed or opted out of by agreement between states, which is not true of jus cogens.
  2. Negotiable norms: is actually the reverse of the concept, jus cogens norms bind states regardless of consent or treaty terms, they cannot be negotiated away.
  3. Non-derogable norms: fits because jus cogens rules, such as the prohibition on genocide or slavery, apply to every state and cannot be overridden even by mutual agreement, any treaty that tries to do so is void.
  4. Legal norms: again is too generic, it does not explain why a conflicting treaty would be void, only the non-derogable character of jus cogens explains that.

The correct answer is Non-derogable norms, since jus cogens describes peremptory rules of international law that no state can contract out of.

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