generates State responsibility and consequently gives rise to a corresponding claim for cessation and reparation (lato sensu) only when such legislation is concretely applied. By contrast, in the case of torture, the mere fact of keeping in force or passing legislation contrary to the international prohibition of torture generates international State responsibility. The value of freedom from torture is so great that it becomes imperative to preclude any national legislative act authorising or condoning torture or at any rate capable of bringing about this effect. (b) The Prohibition Imposes Obligations Erga Omnes. 151. Furthermore, the prohibition of torture imposes upon States obligations erga omnes, that is, obligations owed towards all the other members of the international community, each of which then has a correlative right. In addition, the violation of such an obligation simultaneously constitutes a breach of the correlative right of all members of the international community and gives rise to a claim for compliance accruing to each and every member, which then has the right to insist on fulfilment of the obligation or in any case to call for the breach to be discontinued. 152. Where there exist international bodies charged with impartially monitoring compliance with treaty provisions on torture, these bodies enjoy priority over individual States in establishing whether a certain State has taken all the necessary measures to prevent and punish torture and, if they have not, in calling upon that State to fulfil its international obligations. The existence of such international mechanisms makes it possible for compliance with international law to be ensured in a neutral and impartial manner. (c) The Prohibition Has Acquired the Status of Jus Cogens. 153. While the erga omnes nature just mentioned appertains to the area of international enforcement (lato sensu), the other major feature of the principle proscribing torture relates to the hierarchy of rules in the international normative order. Because of the importance of the values it protects, this principle has evolved into a peremptory norm or jus cogens, that is, a norm that enjoys a higher rank in the international hierarchy than treaty law and even ‘ordinary’ customary rules. The most conspicuous consequence of this higher rank is that the principle at issue cannot be derogated from by States through -26-