Changes made by 75/327/EEC: Council Decision of 20 May 1975 on the improvement of the situation of railway undertakings and the harmonization of rules governing financial relations between such undertakings and States
EU Decision 1975/327
No changes made by 75/327/EEC: Council Decision of 20 May 1975 on the improvement of the situation of railway undertakings and the harmonization of rules governing financial relations between such undertakings and States are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.