Judgment_paragraph 45 · Salzburger Gebietskrankenkasse and Bundesminister für Arbeit, Soziales und Konsumentenschutz v Alpenrind GmbH and Others (C-527/16)

45Furthermore, as the Advocate General observed in point 35 of his Opinion, the considerations underlying the case-law of the Court relating to the binding effect of the E 101 certificates are as valid in the context of Regulations Nos 883/2004 and 987/2009. In particular, although the principle of legal certainty is mentioned, in recital 6 of Regulation No 987/2009, the principle of the affiliation of employees to a single social security scheme is set out in recital 15 and Article 11(1) of Regulation No 883/2004, while the importance of the principle of sincere cooperation derives from Article 76 of Regulation No 883/2004 and recital 2 and Article 20 of Regulation No 987/2009.