554As regards the time which elapsed between the two infringements, neither Regulation No 1/2003 nor the Guidelines on the method of setting fines imposed pursuant to Article 15(2) of Regulation No 17 and Article 65(5) [CS] (OJ 1998 C 9, p. 3; ‘the 1998 Guidelines’) establish a maximum period for taking repeated infringement into account, and the Court has held that the absence of such a period does not, in itself, infringe the principle of legal certainty (judgment of 17 June 2010, Lafarge v Commission, C‑413/08 P, EU:C:2010:346, paragraphs 66 and 67).