(29)The proposal for a directive on the access to the activity of credit institutions and the prudential supervision of credit institutions and investment firms and the proposal for a regulation on prudential requirements for credit institutions and investment firms, which are to replace Directive 2006/48/EC of the European Parliament and of the Council of 14 June 2006 relating to the taking up and pursuit of the business of credit institutions 11 and Directive 2006/49/EC of the European Parliament and of the Council of 14 June 2006 on the capital adequacy of investment firms and credit institutions 12 , introduce a requirement for credit institutions and investment firms to assess the credit risk of entities and financial instruments in which they invest themselves and not simply to rely in this respect on credit ratings. That requirement should be extended to other financial market participants regulated under Union law, including investment managers. For all financial market participants, however, that requirement should be enforced in a proportional manner taking into account the nature, scale, and complexity of the participant in question. Member States should not be entitled to impose or maintain rules that allow stricter reliance by those investors on credit ratings.