Case C-447/22 P: Judgment of the Court (First Chamber) of 5 September 2024 – Republic of Slovenia v Petra Flašker and European Commission (Appeal – State aid – Articles 107 and 108 TFEU – Measures granted by the Republic of Slovenia to a municipal network of dispensing pharmacies before its accession to the European Union – Preliminary examination phase – Failure to initiate the formal investigation procedure – Concept of serious difficulties – Extent of the European Commission’s investigative duty – Burden of proof on the party relying on the existence of serious difficulties – Scope)