Opinion of the European Central Bank of 6 July 1998 at the request of the Commission of the European Communities under Article 5(3) of Council Regulation (EC) No 2494/95 of 23 October 1995 and Article 109l(2) of the Treaty establishing the European Community on a draft Commission Regulation (EC) concerning minimum standards for the treatment of tariffs in the Harmonised Index of Consumer Prices (CON/98/33).