++++ 1. Tax provisions ° Harmonization of laws ° Turnover taxes ° Common system of value added tax ° Supply of services ° Determination of place of taxation ° "Advertising services" within the meaning of the Sixth Directive ° Definition ° Promotional activity (Council Directive 77/388, Art. 9(2)(e)) 2. Actions against Member States for failure to fulfil obligations ° Objective nature ° Whether account may be taken of incorrect interpretation of Community legislation ° Not permitted (EEC Treaty, Art. 169)