Opinion of the Commission pursuant to Article 251(2)(c) of the EC Treaty on the European Parliament's amendments to the Council's common position regarding the proposal for a directive of the European Parliament and of the Council amending Directive 93/104/EC of 23 November 1993 concerning certain aspects of the organization of working time to cover sectors and activities excluded from that directive, amending the proposal of the Commission pursuant to Article 250(2) of the EC Treaty