55The referring court has found that there is a serious risk that infringements of national rules relating to the reallocation of cases may have the objective of enabling a certain judge to rule on a specific case or on a certain type of case. In those circumstances, as the Advocate General noted in point 48 of her Opinion, the doubts thus expressed by the referring court are sufficient to regard the questions relating to the application of those rules as having to be assessed in the light of the requirements of EU law relating to the guarantee of an independent and impartial tribunal previously established by law.