(21)As a consequence of the bovine spongiform encephalopathy (BSE) and the dioxin crises, the obligation to indicate the percentage by weight of all feed materials incorporated in compound feed was introduced in 2002 by Directive 2002/2/EC of the European Parliament and of the Council of 28 January 2002 amending Council Directive 79/373/EEC on the circulation of compound feedingstuffs 18 , at the initiative of the European Parliament. Furthermore, the level of food and feed safety has been significantly improved as a result of Regulation (EC) No 178/2002 and Regulation (EC) No 183/2005 and their implementing measures, in particular as a result of the focus put on the responsibility placed on feed and food business operators, the improved traceability system, the introduction of the hazard analysis and critical control points (HACCP) principle in feed businesses and the creation of guides to good hygiene practice in feed businesses. In light of these positive achievements, mirrored in the notifications to the Rapid Alert System for Food and Feed (RASFF), the obligation to indicate the percentage by weight of all feed materials incorporated in compound feed on the labelling is no longer necessary for the purpose of ensuring a high level of feed safety and thus a high level of protection of public health. The exact percentages may, however, be provided on a voluntary basis for the purpose of providing adequate information to purchasers. Furthermore, given that the competent authorities have access to information on the exact percentages by weight of all feed materials incorporated in compound feed, they should be able, on the ground of any urgency relating to human or animal health or to the environment, and in accordance with Directive 2004/48/EC of the European Parliament and of the Council of 29 April 2004 on the enforcement of intellectual property rights 19 , to provide further information to purchasers.