"The Court has stated on many occasions that each State Party to the Convention “must adopt all necessary measures to ensure that the provisions of the Convention are effectively complied with in its domestic legal order, as required by Article 2 of the Convention.” It has also indicated that the States “must adopt positive measures, avoid taking initiatives that limit or infringe a fundamental right and eliminate the measures and practices that restrict or violate a fundamental right.” The obligation contained in Article 2 of the Convention acknowledges a customary norm which provides that, when a State has ratified an international convention, it must introduce into its domestic law the necessary modifications to ensure the execution of the international obligations it has assumed. "
OAS (IACHR): Case of Castañeda Gutman v. México, par. 132

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Case of Castañeda Gutman v. México


Spanish; Castilian