COMMISSION STAFF WORKING DOCUMENT EXECUTIVE SUMMARY OF THE IMPACT ASSESSMENT Accompanying the documents Proposal for a Regulation of the European Parliament and of the Council on the European Union Agency for Railways and repealing Regulation (EC) No 881/2004 Proposal for a Directive of the European Parliament and of the Council on the interoperability of the rail system within the European Union (Recast) Proposal for a Directive of the European Parliament and of the Council on railway safety (Recast)