Changes to Commission Decision of 6 June 2001 establishing the Committee of European Securities Regulators (notified under document number C(2001) 1501) (2001/527/EC)
EU Decision 2001/527
Made by 2004/7/EC: Commission Decision of 5 November 2003 amending Decision 2001/527/EC establishing the Committee of European Securities Regulators
From legislation.gov.uk's record of changes, the official one: see it there.