286In any event, as already recalled above, the Commission’s previous practice in taking decisions does not serve as a legal framework for fines imposed in competition matters (see, by analogy, Michelin v Commission, paragraph 259 above, paragraph 292). Furthermore, the fact that in the past the Commission has applied fines of a particular level for certain types of infringements does not mean that it is precluded from raising that level within the limits indicated in Regulation No 4064/89 if that is necessary to ensure the implementation of EU competition policy. Indeed, the proper application of the EU competition rules requires that the Commission be able at any time to adjust the level of fines to the needs of that policy (see, by analogy, Dansk Rørindustri and Others v Commission, paragraph 230 above, paragraph 169 and the case-law cited).