(14)Directive 82/471/EEC aims to improve the supply of feed used as direct and indirect protein sources in the Community. That Directive requires a pre-market authorisation procedure for all possible bio-proteins. However, only very few new authorisations have been granted to date and the shortage of protein-rich feed is still evident. Thus, the general pre-market authorisation requirement has proved to be prohibitive, and safety risks could be tackled instead by means of prohibiting risky products based on market surveillance. In cases where the outcome of the risk assessment of a bio-protein is negative, its circulation or use should be prohibited. Hence, the special requirement of a general pre-market authorisation procedure for bio-proteins should be abolished, with the consequence that the safety system for such products be the same as for all other feed materials. The existing restrictions or prohibition of certain bio-proteins should not be affected.