Judgment_paragraph 42 · Radosław Szoja v Sociálna poisťovňa and WEBUNG, s.r.o (C-89/16)

42In that connection, it must recalled that since the conflict rules laid down by the Basic Regulation are mandatory for the Member States, a fortiori it cannot be accepted that insured persons falling within the scope of those rules can counteract their effects by being able to elect to withdraw from their application (see, to that effect, judgment of 14 October 2010, von Delft and Others, C‑345/09, EU:C:2010:610, paragraph 52).