L 103/6 Official Journal of the European Union 23.4.2009 COMMISSION REGULATION (EC) No 330/2009 of 22 April 2009 laying down detailed rules for the implementation of Council Regulation (EC) No 2494/95 as regards minimum standards for the treatment of seasonal products in the Harmonised Indices of Consumer Prices (HICP) (Text with EEA relevance) THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Community, Having regard to Council Regulation (EC) No 2494/95 of 23 October 1995 concerning harmonised indices of consumer prices (1), and in particular the third paragraph of Article 4 and Article 5(3) thereof, Whereas: Harmonised Indices of Consumer Prices (HICP) are harmonised inflation measures required by the Commission and the European Central Bank for the performance of their functions under Article 121 of the EC Treaty. HICPs are designed to facilitate inter- national comparisons of consumer price inflation. They serve as important indicators for the management of monetary policy. Under Article 5(1)(b) of Regulation (EC) No 2494/95, each Member State is required, as part of the implemen- tation of that Regulation, to produce an HICP starting with the index for January 1997. Commission  Regulation (EC) No 1749/96 of 9 September 1996 on initial implementing measures for Council Regulation (EC) No 2494/95 concerning harmonised indices of consumer prices (?) defines the coverage of the HICP as those goods and services which are included in household final monetary consumption expenditure incurred on the economic territory of the Member State, in one or both of the time periods being compared. Article 2 of Commission Regulation (EC) No 2214/96 of 20 November 1996 concerning harmonised indices of consumer prices: transmission and dissemination of sub-indices of the HICP () defines a breakdown of 257, 27.10.1995, p. 1. oJ L 0J L 229, 10.9.1996, p. 3. oL 296, 21.11.1996, p. 8. COICOP[HICP (% by division (two-digit level), group (three-digit level) and class (four-digit level). Article 2 of Commission Regulation (EC) No 2454/97 of 10 December 1997 laying down detailed rules for the implementation of Council Regulation (EC) No 2494/95 as regards minimum standards for the quality of HICP weightings (°) defines the ‘weighting reference period” of an HICP as a 12-month period of consumption or expenditure. According to Article 3 thereof Member States should each month produce HICPs using weightings which reflect the consumers’ expenditure pattern in the weighting reference period. Consequently weightings at the level of COICOP/HICP divisions, groups and classes are required not to vary between months during the year. Nevertheless weightings at a more detailed level of COICOP/HICP might be allowed to reflect a seasonally varying consumption pattern. Although indices without and with seasonal weighting variability correspond to different statistical targets, restrictions on the methodology may ensure the necessary comparability between those two approaches, as well as comparability between Member States within the approaches. Seasonal products are typically not available or their purchased volumes are negligible for certain periods in an annual cyclical pattern and according to Article 6 of Regulation (EC) No 1749/96 where target samples do not require monthly observation of actual prices throughout the year estimated prices should be used instead. Commission Regulation (EC) No 1921/2001 of 28 September 2001 laying down detailed rules for the implementation of Council Regulation (EC) No 2494/95 as regards minimum standards for revisions of the harmonised index of consumer prices and amending Regulation (EC) No 26022000 (°) sets the framework for revisions in the HICPs. (*) Classification of Individual Consumption by Purpose adapted to the needs of HICPs. () OJ L 340, 11.12.1997, p. 24. () OJ L 261, 29.9.2001, p. 49.