“Question 1: Where a taxable person has overpaid VAT which was collected by the Member State contrary to the requirements of EU VAT legislation, does the remedy provided by a Member State accord with EU law if that remedy provides only for (a) reimbursement of the principal sums overpaid, and (b) simple interest on those sums in accordance with national legislation, such assection 78 of the Value Added Tax Act 1994 ? Question 2: If not, does EU law require that the remedy provided by a Member State should provide for (a) reimbursement of the principal sums overpaid, and (b) payment of compound interest as the measure of the use value of the sums overpaid in the hands of the Member State and/or the loss of the use value of the money in the hands of the taxpayer? Question 3: If the answer to both questions 1 and 2 is in the negative, what must the remedy that EU law requires the Member State to provide include, in addition to reimbursement of the principal sums overpaid, in respect of the use value of the overpayment and/or interest? Question 4: If the answer to question 1 is in the negative, does the EU law principle of effectiveness require a Member State to disapply national law restrictions (such as sections 78 and 80 of theValue Added Tax Act 1994 ) on any domestic claims or remedies that would otherwise be available to the taxable person to vindicate the EU law right established in the Court of Justice’s answer to the first 3 questions, or can the principle of effectiveness be satisfied if the national court disapplies such restrictions only in respect of one of these domestic claims or remedies? What other principles should guide the national court in giving effect to this EU law right so as to accord with the EU law principle of effectiveness?”
“I understand the correct approach in principle of a national court (other than a final court of appeal) to be quite clear: if the facts have been found and the Community law issue is critical to the court's final decision, the appropriate course is ordinarily to refer the issue to the Court of Justice unless the national court can with complete confidence resolve the issue itself. In considering whether it can with complete confidence resolve the issue itself the national court must be fully mindful of the differences between national and Community legislation, of the pitfalls which face a national court venturing into what may be an unfamiliar field, of the need for uniform interpretation throughout the Community and of the great advantages enjoyed by the Court of Justice in construing Community instruments. If the national court has any real doubt, it should ordinarily refer. ”
“117…But it is, we think, important to have in mind, also, the observations of the Advocate General (Jacobs) in Wiener SI GmbH v Hauptzollamt Emmerich (Case C-338/95 )[1997] ECR I-6495 . A measure of self-restraint is required on the part the national courts, if the Court of Justice is not to become overwhelmed. A passage of his opinion is of particular relevance in the present context (see[1997] ECR I-6495 at 6515–6516, para 61)— “... another development which is unquestionably significant is the emergence in recent years of a body of case-law developed by this Court to which national courts and tribunals can resort in resolving new questions of Community law. Experience has shown that, in particular in many technical fields, such as customs and value added tax, national courts and tribunals are able to extrapolate from the principles developed in this Court's case-law. Experience has shown that that case-law now provides sufficient guidance to enable national courts and tribunals—and in particular specialized courts and tribunals—to decide many cases for themselves without the need for a reference.” 118. In our view this is not an appropriate case for a reference by this court. For the reasons which we have set out we are satisfied that there is ample guidance on the question of principle in the existing decisions of the Court of Justice. We feel confident that we can apply the principle to the particular facts of the appeals which we have to decide.”