Changes made by 1999/218/EC: Commission Decision of 25 February 1999 relating to the procedures whereby officials and employees of the European Commission may be allowed access to classified information held by the Commission (notified under document number C(1999) 423)
EU Decision 1999/218
No changes made by 1999/218/EC: Commission Decision of 25 February 1999 relating to the procedures whereby officials and employees of the European Commission may be allowed access to classified information held by the Commission (notified under document number C(1999) 423) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.