Opinion of the European Central Bank of 12 June 2003 at the request of the Council of the European Union on a proposal for a Directive of the European Parliament and of the Council on investment services and regulated markets, and amending Council Directive 85/611/EEC, Council Directive 93/6/EEC and European Parliament and Council Directive 2000/12/EC (COM(2002) 625 final) (CON/2003/9)