January 10, March 17, and April 3, 2006, in which it presented its observations concerning the status of compliance with the judgment. 6. The notes of the Secretariat of the Court (hereinafter “the Secretariat”) of February 25, and November 30, 2009; February 23, 2010, and March 22, April 15 and 18, and June 6 and 21, 2011, requesting information on compliance with the judgment. CONSIDERING THAT: 1. One of the inherent attributes of the jurisdictional functions of the Court is to monitor compliance with its decisions. 2. Peru has been a State Party to the American Convention on Human Rights (hereinafter “the American Convention” or “the Convention”) since July 28, 1978, and accepted the obligatory jurisdiction of the Court on January 21, 1981. 3. According to Article 67 of the American Convention, the State must comply with the judgments of the Court fully and promptly. Furthermore, Article 68(1) of the American Convention stipulates that “t]he States Parties to the Convention undertake to comply with the judgment of the Court in any case to which they are parties.” To this end, the State must ensure implementation at the domestic level of the Court’s decisions in its judgments.1 4. The obligation to comply with the decisions in the Court’s judgments corresponds to a basic principle of the law of the international responsibility of the State, supported by international case law, according to which, a State must comply with its international treaty obligations in good faith (pacta sunt servanda) and, as this Court has already indicated and as established in Article 27 of the 1969 Vienna Convention on the Law of Treaties, a party may not invoke the provisions of its internal law as justification for its failure to perform a treaty. The treaty obligations of the States Parties are binding for all the powers and organs of the State.2 5. The States Parties to the Convention must ensure compliance with its provisions and their practical effects (effet utile) within their respective domestic legal systems. This principle is applicable not only with regard to the substantive norms of human rights treaties (that is, those which contain provisions concerning the protected rights), but also with regard to procedural norms, such as those referring to compliance with the decisions of the Court. These obligations shall be interpreted and applied so that the protected guarantee is truly practical and effective, bearing in mind the special nature of human rights treaties.3 1 Cf. Case of Baena Ricardo et al. Competence. Judgment of November 28, 2003. Series C No. 104, para. 60; Case of Cesti Hurtado v. Peru. Monitoring compliance. Order of the Inter-American Court of Human Rights of February 4, 2010, Considering clause 3, and Case of El Amparo v. Venezuela. Monitoring compliance. Order of the Inter-American Court of Human Rights of February 4, 2010, Considering clause 3. 2 Cf. International Responsibility for the Promulgation and Enforcement of Laws in Violation of the Convention (Arts. 1 and 2 of the American Convention on Human Rights). Advisory Opinion OC-14/94 of December 9, 1994. Series A No. 14, para. 35; Case of Cesti Hurtado, supra note 2, fifth Considering clause, and Case of El Amparo, supra note 2, Considering clause 5. 3 Cf. Case of Ivcher Bronstein v. Peru. Competence. Judgment of September 24, 1999. Series C No. 54, para. 37; Case of Cesti Hurtado, supra note 2, Considering clause 6, and Case of El Amparo, supra note 2, Considering clause 6. 2