29In that regard, it should be recalled that, with regard to the principle of a single social security scheme, as expressed in Article 13 of Regulation 1408/71 and repeated in Article 11 of Regulation 883/2004, those regulations have established a system of coordination concerning, inter alia, the determination of the legislation applicable to employed and self-employed persons who make use, under various circumstances, of their right to freedom of movement. The completeness of that system of conflict rules has the effect of divesting the legislature of each Member State of the power to determine at its discretion the ambit and the conditions for the application of its national legislation so far as the persons who are subject thereto and the territory within which the provisions of national law take effect are concerned (see, to that effect, judgments of 26 February 2015, de Ruyter, C‑623/13, EU:C:2015:123, paragraphs 34 to 35 and the case-law cited, and of 15 September 2022, Rechtsanwaltskammer Wien, C‑58/21, EU:C:2022:691, paragraphs 43 and 49).
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