(The Companies)... Hoechst AG... have infringed Article 85(1) of the EEC Treaty, by participating:
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in the case of Hoechst, ICI, Montepolimeri and Shell from about mid-1977 until at least November 1983
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in an agreement and concerted practice originating in mid-1977 by which the producers supplying polypropylene in the territory of the EEC :
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contacted each other and met regularly (from the beginning of 1981, twice each month) in a series of secret meetings so as to discuss and determine their commercial policies;
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set “target” (or minimum) prices from time to time for the sale of the product in each Member State of the EEC;
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agreed various measures designed to facilitate the implementation of such target prices, including (principally) temporary restrictions on output, the exchange of detailed information on their deliveries, the holding of local meetings and from late 1982 a system of “account management” designed to implement price rises to individual customers;
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introduced simultaneous price increases implementing the said targets;
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shared the market by allocating to each producer an annual sales target or “quota” (1979, 1980 and for at least part of 1983) or in default of a definitive agreement covering the whole year by requiring producers to limit their sales in each month by reference to some previous period (1981, 1982).