6 rights (such as torture, summary, extra-legal or arbitrary executions, and forced disappearances) are inadmissible; they violate non-derogable rights recognised by the International Law of Human Rights. This case-law has been reiterated by the Court (with regard to prescription) in its decision in the Bulacio versus Argentina case (2003). c) Substantive Law. 18. As to substantive law, the contribution of the two international human rights Courts to this effect is illustrated by numerous examples of their respective case-law pertaining to the rights protected under the two regional Conventions. The European Court has a vast and impressive case-law, for example, on the right to the protection of liberty and security of person (Article 5 of the European Convention), and the right to a fair trial (Article 6). The Inter-American Court has a significant case-law on the fundamental right to life, comprising also the conditions of living, as from its decision in the paradigmatic case of the so-called "Street Children" (Villagrán Morales and Others versus Guatemala, Merits, 1999). 19. Yet another example can be recalled. The definition of the crime of torture found today in two of the three co-existing Conventions against Torture (the U.N. Convention of 1984, Article 1, and the Inter-American Convention of 1985, Article 2) owes its contents to international human rights case-law, rather than to the tipification of the crime of torture at domestic law level. In fact, the constitutive elements of torture in the definition found in the two aforementioned Conventions 17 ensue from the jurisprudential construction of the old European Commission of Human Rights in the Greek case (1967-1970), further discussed by the Commission and the European Court in the Ireland versus United Kingdom case (1971-1978). 20. In this particular instance, international case-law influenced international legislation in the field of human rights protection. The extensive case-law of the European Court covers virtually the totality of the rights protected under the European Convention and some of its Protocols. The growing case-law of the Inter-American Court, in its turn, appears innovative and forward-looking with regard to the right to life, reparations in its multiple forms, and provisional measures of protection, these latter sometimes benefiting members of entire human collectivities 18. 2. Considerations on the Reservations to Treaties. 21. International supervisory organs in the domain of human rights protection have in recent years disclosed their awareness - and, on some occasions, their determination - to the effect of preserving the integrity of human rights treaties. It may be recalled that, inspired in the criterion sustained by the International Court of Justice in its Advisory Opinion of 1951 on the Reservations to the Convention against Genocide 19, the present system of reservations set forth in the two Vienna 17 . Namely, severe physical or mental suffering, intentionally inflicted, to obtain information or a confession, with the consent or acquiescence of authorities or other persons acting in an official capacity. 18 . Cf. A.A. Cançado Trindade, "Les Mesures provisoires de protection dans la jurisprudence de la Cour Interaméricaine des Droits de l'Homme", 4 Revista do Instituto Brasileiro de Direitos Humanos (2003) pp. 13-25; A.A. Cançado Trindade, "The Evolution of Provisional Measures of Protection under the Case-Law of the Inter-American Court of Human Rights (1987-2002)", 24 Human Rights Law Journal - Strasbourg/Kehl (2003) n. 5-8, pp. 162-168. 19 . In which, - it may be recalled, - the Hague Court endorsed the so-called Pan-American practice relating to reservations to treaties, given its flexibility, and in search of a certain balance between the integrity of the text of the treaty and the universality of participation in it; hence the criterion of the compatibility of the reservations with the object and purpose of the treaties. Cf. ICJ Reports (1951) pp. 15-30; and cf., a contrario sensu, the Joint Dissenting Opinion of Judges Guerrero, McNair, Read and Hsu Mo (pp. 31-48), as well as the Dissenting Opinion of Judge Álvarez (pp. 49-55), for the difficulties generated by this criterion.