This International Standard provides general guidelines for the validation of the colour fastness of Spinning & weaving products, including guidelines for the design of the competency verification program, the provision of verification items, statistical processing and evaluation, and reporting and notification of results. It is applicable to the validation of the colour fastness of Spinning & weaving products using the daily test method to assess the series, and it is also applicable to the evaluation plan using the ten-month guide. Terms and definitions refer to GB/T 27043, GB/T 28043 and SN/T 2723.2. Competency verification providers shall visually assess that the Spinning & weaving products colour fastness verification program implemented in accordance with this standard conforms to GB/T 27043. When planning a competency verification plan, the type of verification plan, inspection items, detection methods, equipment, and expected participants should be predetermined.