Leuven Congress book The burden of proof and the retrieval order H. Gribnau & M.R.T. Pauwels - General report Austria Belgium Denmark Finland Germany Greece Hungary Italy Luxembourg Netherlands Poland Portugal Spain Sweden Turkey United Kingdom United States (1) United States (2) M. Lang - Limitation of the temporal effects of judgements of the ECJ F. Vanistendael - The crisis, a window of necessity for EU taxation Questionnaire M. Moessner - The crisis: A window of necessity for EU taxation