Jus cogens

Jus Cogens definition:
Latin: peremptory law.
A mandatory legal standard from which no derogation, in domestic law or international law, is allowed.
As the United States District Court wrote in Smith: ...

Jus Cogens
"Latin meaning "compelling law." This "higher law" may not be violated by any country. For example, genocide or slave trade may be considered to go against jus cogens.
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JUS COGENS
Universal peremptory norms, while not defined in any treaty, include those "higher laws" which no country may disregard. If part of a treaty violates jus cogens, then the entire treaty invalidated.

Jus cogens
Principles of international law so fundamental that no nation may ignore them or attempt to contract out of them through treaties.
For example, genocide and participating in a slave trade are thought to be jus cogens.

Jus cogens
Definition - Noun
[New Latin, literally, constraining law] ...

The only limit to pacta sunt servanda are the peremptory norms of general international law, called jus cogens (compelling law).

See also: Law, Jus, National, State, International law