23 the Vienna Convention on the Law of Treatises.118 In this regard, when interpreting the American Convention, the alternative that is most favorable to protection of the rights enshrined in said treaty must always be chosen, based on the principle of the rule most favorable to the human being.119 78. Although the Inter-American Court, in its usual exercise, only has authority to apply the treaties of the Inter-American System over which it has jurisdiction, it is also common to find an integrative exercise of the rights when international standards are taken into account – at a strictly interpretative level – from the European or African systems, or the Universal Human Rights Systems. 79. For instance, in analyzing the content and scope of Article 21 of the American Convention in relation to the communal property of the members of indigenous communities, the Inter-American Court has taken into account Convention No. 169 of the ILO in the light of the general interpretation of rules established under Article 29 of the Convention, in order to construe the provisions of the aforementioned Article 21 in accordance with the evolution of the Inter-American system considering the development that has taken place regarding these matters in international human rights law. 120 In another recent example, in a case on the rights of immigrants and refugees, the InterAmerican Court considered121 that: 129. In response to the special needs of protection for migrant persons and groups, this Court interprets and warrants substance to the rights recognized under the Convention, in accordance with the evolution of the international corpus juris applicable to the human rights of migrants.122 (…) 143. In accordance with Article 29(b) of the Convention, in order to interpret and apply the norms of the Convention specifically in order to determine the scope of State obligations in 118 Cf. Case of the Mapiripán Massacre V. Colombia, Merits, Reparations and Costs. Judgment of September, 15, 2005. Series C No. 134, para. 106. 119 Cf. Case of Ricardo Canese V. Paraguay. Merits, Reparations and Costs. Judgment of August 31, 2004. Series C No. 111, para. 181; Case of Herrera Ulloa V. Costa Rica. Preliminary Objections, Merits, Reparations and Costs. Judgment of July 2, 2004. Series C No. 107, para. 184; and Case of Baena Ricardo et al. V. Panamá. Merits, Reparations and Costs. Judgment of February 2, 2001. Series C No. 72, para. 189. 120 Costs. Tingni paras. Costs. See, for example: Case of the Yakye Axa Indigenous Community V. Paraguay. Merits, Reparations and Judgment of June 17, 2005. Series C No. 125.paras. 124 to 131, and Case of the Mayagna (Sumo) Awas Community V. Nicaragua. Merits, Reparations and Costs. Judgment of August 31, 2001. Series C No. 79, 148 and 149; and Case of Sawhoyamaxa Indigenous Community V. Paraguay. Merits, Reparations and Judgment of March 29, 2006. Series C No. 146, para. 117. 121 Case of Pacheco Tineo Family V. Plurinational State of Bolivia. Preliminary Objections, Merits, Reparations and Costs. Judgment of November 25, 2013. Series C No. 272, paras. 129 and 143. 122 Cf.Juridical Condition and Rights of the Undocumented Migrant. Advisory Opinion OC-18/03 of September 17, 2003. Series to No. 18, para. 117, citing United Nations, Report of the World Summit for Social Development held in Copenhagen, 6 to 12 of March, 1995, A/CONF.166/9, of April 19, 1995,Annex II Program of Action, paras. 63, 77 and 78, available at:http://www.inclusion-ia.org/espa%F1ol/Norm/copspanish.pdf; United Nations, Report of the International Conference on Population and Development held in Cairo on September 5 to 13, 1994, A/CONF.171/13, of October 18, 1994, Program of Action, Chapter X.A. 10. 2 to 10.20, available at: http://www.un.org/popin/icpd/conference/offspa/sconf13.html, and United Nations, General Assembly, World Conference on Human Rights held Vienna, Austria, from June 14 to 25, 1993, A/CONF. 157/23, from July 12, 1993, Declaration and Program of Action, I.24 and II.33-35, available at: http://www.cinu.org.mx/temas/dh/decvienapaccion.pdf.