The story
On 1 January 2002, the new Railway Transport Act entered into force, passed by the National Assembly of the Republic of Bulgaria, according to which the National Company Bulgarian State Railways were split into two separate enterprises – a railway carrier (Bulgarian State Railways EAD) and an infrastructure enterprise (Railway Infrastructure National Company)
The European Commission formally warned Bulgaria in May 2010 for failure to implement the First Railway rules on track access charges.
In October 2010 further restructuring was announced, with BDŽ EAD becoming a holding company, and all rolling stock allocated to passenger & freight subsidiaries.
From Wikipedia’s article on Bulgarian State Railways, shared under CC BY-SA 4.0.4