2.Article 3 is replaced by the following:‘Article 3The obligation of Member States to adopt survey methods designed to facilitate the collection of data from units representing at least 90 % of national production per NACE class referred to in Article 3(2) of Regulation (EEC) No 3924/91 is to be implemented as Member States’ adoption of survey methods designed to enable the collection of data, representing at least 90 % of national production for each NACE Rev. 2 class of sections B and C.’