On 21 March 2007, the European Commission decided to pursue infringement proceedings against ten Member States that have not yet communicated their national implementation measures to transpose two key Directives of the so-called "second railway” package. The ten Member States concerned are: Germany, Greece, Spain, Italy, Luxembourg, the Netherlands, Portugal, Sweden, Slovenia and the Slovak Republic. The Directives should have been transposed into national legislation before 30 April 2006. The first Directive (2004/49/EC) aims at strengthening rail safety by ensuring full transparency in relation to safety procedures in force. The second Directive (2004/50/EC) updates legislation already in force on technical interoperability which is a step required to achieve a fully integrated European railway market.