Sixth Council Directive 77/388/EEC of 17 May 1977 on the harmonization of the laws of the Member States relating to turnover taxes - Common system of value added tax: uniform basis of assessment Modified by Council Directive 92/111/EEC of 14 December 1992 amending Directive 77/388/EEC and introducing simplification measures with regard to value added tax Invalid Date article 28QUINQUIES.4 Amendment December 30, 1992 article 28OCTIES Completion December 30, 1992 article 28BIS.5 Completion December 30, 1992 article 15.4 Amendment December 30, 1992 article 28TER.A Completion Invalid Date article 28QUATER.A Completion December 30, 1992 article 15.3 Amendment December 30, 1992 article 33BIS.2 Replacement December 30, 1992 article 15.2 Completion Invalid Date article 28QUINDECIES Addition Invalid Date article 28BIS.1BIS Addition December 30, 1992 article 15.13 Replacement December 30, 1992 article 11.B Amendment December 30, 1992 article 15.10 Completion December 30, 1992 article 7.3 Amendment December 30, 1992 article 28DECIES Replacement December 30, 1992 article 28BIS.6 Completion Invalid Date article 28SEXIES.1 Completion December 30, 1992 article 28NONIES Completion December 30, 1992 article 8.1 Amendment December 30, 1992 article 12.1 Amendment Invalid Date article 28QUINQUIES.3 Replacement December 30, 1992 article 14.1 Completion December 30, 1992 article 7.1 Amendment December 30, 1992 article 12.3 Amendment December 30, 1992 article 28SEXIES Amendment December 30, 1992 article 28BIS.1 Completion December 30, 1992 article 33BIS.1 Replacement December 30, 1992 article 3.4 Replacement Invalid Date article 28QUATER.E Replacement Invalid Date article 28SEPTIES Completion