No 'L 80/18 Official Journal of the European Communities 24. 3. 87 COMMISSION REGULATION (EEC) No 832/87 of 23 March 1987 fixing for the 1987 marketing year the Community offer price for tomatoes applicable with regard to Greece THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, Having regard to the Act of Accession of Greece, Having regard to Council Regulation (EEC) No 10/81 of 1 January 1981 fixing, in respect of fruit and vegetables, the general rules for implementing the 1979 Act of Accession ('), and in particular Article 9 (1) thereof, Whereas Article 75 of the Act of Accession introduces a compensatory mechanism on import into the Commu- nity of Nine, for fruit and vegetables coming from Greece for which an institutional price is fixed; Whereas, in accordance with Article 75 (2) (a) of the Act of Accession, a Community offer price is to be calculated annually, on the one hand, on the basis of the arithme- tical average of producer prices of each Member State of the Community of Nine, increased by the transport and packaging costs borne by the products from the areas of production up to the representative centres of Commu- nity consumption and, on the other hand, taking into account the trend of production costs in the fruit and vegetables sector ; whereas the said producer prices are to correspond to an average of the price quotations recorded over three years prior to fixing the Community offer price ; whereas, however, the annual Community offer price may not exceed the level of the reference price applied wvis-@-vis third countries, this Community offer price being reduced by 21 % at the time of the seventh move toward price alignment referred to in Article 59 of the Act; Whereas, in order to take account of seasonal price varia- tions, the marketing year should be split into several periods and a Community offer price fixed for each such period ; Whereas, by virtue of Article 3 of Regulation (EEC) No 10/81, the rates used to calculate production prices are those recorded for an indigenous product whose trade characteristics are defined, on the representative market or markets within the production zones where the rates are lowest, for the products or varieties which represent a substantial proportion of marketable production throughout the year or during a part of the year and which correspond to quality class I and to set conditions in respect of packaging ; whereas the average rate for each representative market is to be drawn up disregarding rates which may be considered excessively high or low () OJ No L 1, 1. 1. 1981, p. 17. compared with the normal fluctuations recorded on the said market ; Whereas, up to 10 July, tomatoes produced in the Community of Nine are grown mainly under glass; whereas the Community offer price for this period of the marketing year must therefore be fixed for a product of that type; whereas Greek tomatoes during the same period will have been grown in the open; whereas, although such tomatoes may be classed in class I, their quality and price are not comparable with those of products grown under glass ; whereas the prices for toma- toes not grown under glass should therefore be adjusted by a conversion factor; Whereas application of the abovementioned criteria results in fixing the Community offer prices for tomatoes for the period 1 April to 20 December 1987 at the levels set out hereinafter; Whereas the measures provided for in this Regulation are in accordance with the opinion of the Management Committee for Fruit and Vegetables, HAS ADOPTED THIS REGULATION : Article 1 1.  For the 1987 marketing year, the Community offer price for tomatoes (subheading 07.01 M of the Common Customs Tariff), expressed in ECU per 100 kilograms net of packed products of class I, of all sizes, shall be as follows : — April: 125,43 — May: 100,70 ~— 1 June to 10 July: 76,38 — 11 July to 31 August: 32,43 — September : 32,85 — 1 October to 20 December: 34,60. 2. For the purpose of calculating the Greek offer price, the prices for tomatoes not produced under glass shall be multiplied : — for April, by a conversion factor of 1,80, — for May, by a conversion factor of 1,70, — from 1 June to 10 July, by a conversion factor of 1,65. Article 2 This Regulation shall enter into force on 1 April 1987.