It follows from settled caselaw that, in so far as any given national rules concern only relationships within a group of companies, they primarily affect the freedom of establishment (see, inter alia, to that effect Test Claimants in the FII Group Litigation, paragraph 118; Test Claimants in Class IV of the ACT Group Litigation, paragraph 33; and Oy AA, paragraph 23).
Da giurisprudenza costante risulta che, se una normativa riguarda solo relazioni nell’ambito di uno stesso gruppo societario, essa incide prevalentemente sulla libertà di stabilimento (v., in particolare, in tal senso, le citate sentenze Test Claimants in the FII Group Litigation, punto 118; Test Claimants in Class IV of the ACT Group Litigation, punto 33, e Oy AA, punto 23).