50To answer those questions, it should be recalled that in order to ensure free movement of workers within the European Union, while upholding the principle of equal treatment of those persons under the various measures of national legislation, Title II of Regulation No 1408/71 has established a system of coordination concerning, inter alia, the determination of the legislation applicable to employed and self-employed workers who make use 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 (judgment of 26 February 2015, de Ruyter, C‑623/13, EU:C:2015:123, paragraph 34 and 35 and the case-law cited).
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