Peremptory norm
It does mention the prohibition on the threat of use of force and on the use of coercion to conclude an agreement: A treaty is void if, at the time of its conclusion, it conflicts with a peremptory norm of general international law.However, the language of peremptory norms was not used in connection with these trials; rather, the basis of criminalisation and punishment of Nazi atrocities was that civilisation could not tolerate their being ignored because it could not survive their being repeated.[11] The United States argued that there was no jus cogens norm that "establishes eighteen years as the minimum age at which an offender can receive a sentence of death".[11] The Commission concluded that there was a "jus cogens norm not to impose capital punishment on individuals who committed their crimes when they had not yet reached 18 years of age".Although not necessarily in response to the above non-binding report, the Supreme Court cited evolving international norms as one of the reasons for the ban (Roper v. Simmons).