(15)It is necessary to lay down methods for the sampling and analysis of textile products in order to exclude any possibility of objections to the methods used. The methods used for official tests carried out in the Member States to determine the fibre composition of textile products composed of binary and ternary fibre mixtures should be uniform, as regards both the pre-treatment of the sample and its quantitative analysis. In order to simplify this Regulation and adapt the uniform methods set out therein to technical progress, it is appropriate that those methods be turned into harmonised standards. To that end, the Commission should manage the transition from the current system, which is based on the methods set out in this Regulation, to a harmonised standard-based system. The use of uniform methods of analysis of textile products composed of binary and ternary fibre mixtures will facilitate the free movement of those products, and thereby improve the functioning of the internal market.