(19)To further improve the usability of Appendix C, additional targeted amendments should be made to point (f) of that Appendix to specify a minimum concentration limit for substances of very high concern in a product and a reference date for the assessment of compliance with the requirement specified in that point. In addition, point (g) of Appendix C should be deleted and replaced by a new paragraph which specifies a minimum concentration limit and the scope of application of the requirement specified in that paragraph.