Single European Railway Directive 2012
The Single European Railway Directive 2012 (2012/34/EU) is an EU Directive that regulates railway networks in European Union law. This recast the First Railway Directive 91/440/EEC and consolidates legislation from each of the first to the fourth "Package" from 1991 to 2016, and allows open access operations on railway lines by companies other than those that own the rail infrastructure.
Source: Wikipedia — Single European Railway Directive 2012 (CC BY-SA 4.0)