4. 7. 86 Official Journal of the European Communities No L 180/17 COMMISSION REGULATION (EEC) No 2094/86 of 3 July 1986 laying down detailed rules for the use of tartaric acid for the de-acidification of specified wine products in certain regions of Zone A THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, Having regard to Council Regulation (EEC) No 337/79 of 5 February 1979 on the common organization of the market in wine ('), as last amended by Regulation (EEC) No 3805/85 (%), and in particular Article 46 (6) thereof, Whereas the first subparagraph of Article 46 (3) of Regu- lation (EEC) No 337/79 providés for the possibility of adding, until 31 August 1990 at the latest, and for the purposes of de-acidification, tartaric acid to wine products made from vine varieties which yield relatively acidic grapes and which are made from grapes harvested in certain wine-growing regions in the northern part of wine-growing zone A ; whereas it is necessary, therefore, to specify the vine varieties as well as the regions concerned ; Whereas the measures provided for in this Regulation are in accordance with the opinion of the Management Committee for Wine, HAS ADOPTED THIS REGULATION : Article 1 1.  The vine varieties referred to in the first indent of the first subparagraph of Article 46 (3) of Regulation (EEC) No 337/79 are ‘Riesling’ and ‘Elbling’. 2. The wine-growing regions referred to in the second indent of the first subparagraph of Article 46 (3) of Regu- lation (EEC) No 337/79 are the following: — Ahr, — Mittelrhein, — Mosel-Saar-Ruwer, — Nahe, — Rheinhessen, — Rheinpfalz, — Moselle luxembourgeoise. Article 2 This Regulation shall enter into force on the third day following that of its publication in the Official Journal of the European Communities. It shall apply with effect from 1 September 1985. This Regulation shall be binding in its entirety and directly applicable in all Member States. Done at Brussels, 3 July 1986. () OJ No L 54, 5. 3. 1979, p. 1. () OJ No L 367, 20. 12. 1985, p. 39. For the Commission Frans ANDRIESSEN Vice-President