• Discriminatory practices involving, within the common  market, the application by a  seller of dissimilar conditions to comparable transactions, especially on grounds of the  nationality of the buyer.

The Commission may define the practices covered by this prohibition by decisions taken after  consulting the Consultative Committee and the Council.

2. For these purposes:

a. The price lists and conditions of sale applied by undertakings within the common market  must be made public to the extent and in the manner prescribed by the Commission after  consulting the Consultative Committee. If the Commission finds that an undertaking's choice of point on which it bases its price lists is abnormal and in particular makes it possible to  evade the provisions of subparagraph ( b ), it shall make appropriate recommendations to  that undertaking;

b. The methods of quotation used must not have the effect that prices charged by an  undertaking in the common market, when reduced to their equivalent at the point chosen for  its price lists, result in:

• Increases over the price shown in the price list in question for a comparable  transaction; or
• Reductions below that price the amount of which exceeds either:
• The extent enabling the quotation to be aligned on the price list, based on another point  which secures the buyer the most advantageous delivered terms; or
• The limits fixed, by decision of the Commission after the Consultative Committee has  delivered its opinion, for each category of product, with due regard, where appropriate, for  the origin and destination of products.

Such decisions shall be taken when found necessary, to avoid disturbances in the whole or  any part of the common market or disequilibria resulting from a difference between the  methods of quotation used for a product and for materials involved in making it.  Such  decisions shall not preclude undertakings from aligning their quotations on those of  undertakings outside the Community, on condition that the transactions are notified to the  Commission, which may, in the event of abuse, restrict or abrogate the right of the  undertakings concerned to take advantage of this exception.

Article 6l

On the basis of studies made jointly with undertakings and associations of undertakings, in  accordance with the first paragraph of Article 46 and the third paragraph of Article 48, and  after consulting the Consultative Committee and the Council as to the advisability of so doing  and the price level to be so determined, the Commission may, for one or more of the products  within its jurisdiction:

a. Fix maximum prices within the common market, if it finds that such a decision is necessary  to attain the objectives set out in Article 3, and particularly in paragraph ( c ) thereof;

b. Fix minimum prices within the common market, if it finds that a manifest crisis exists or is  imminent and that such a decision is necessary to attain the objectives set out in Article 3;

c. After consulting the associations to which the undertakings concerned belong, or the  undertakings themselves, fix, by methods appropriate to the nature of the export markets,  minimum or maximum export prices, if such an arrangement can be effectively supervised

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