Case C-329/23, Sozialversicherungsanstalt: Judgment of the Court (Seventh Chamber) of 26 September 2024 (request for a preliminary ruling from the Verwaltungsgerichtshof – Austria) – Sozialversicherungsanstalt der Selbständigen v W M (Reference for a preliminary ruling – Migrant workers – Social security – Legislation applicable – Regulation (EEC) No 1408/71 – Articles 13 and 14a – Regulation (EC) No 883/2004 – Article 11 and Article 13(2) – Worker simultaneously pursuing an activity as a self-employed person in the territory of two or more States, including a Member State of the European Union, a State of the European Free Trade Association, which is a party to the Agreement on the European Economic Area, and the Swiss Confederation – Article 87(8) – Concept of relevant situation – Agreement on the European Economic Area – Agreement between the European Community and its Member States, of the one part, and the Swiss Confederation, of the other, on the free movement of persons)