Changes made by 2001/260/EC: Commission Decision of 21 March 2001 on the basic parameters of the command-control and signalling subsystem of the trans-European high-speed rail system referred to as "ERTMS characteristics" in Annex II(3) to Directive 96/48/EC (notified under document number C(2001) 746)
EU Decision 2001/260
No changes made by 2001/260/EC: Commission Decision of 21 March 2001 on the basic parameters of the command-control and signalling subsystem of the trans-European high-speed rail system referred to as "ERTMS characteristics" in Annex II(3) to Directive 96/48/EC (notified under document number C(2001) 746) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.